AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
ISOLDE
Draft saved at 00:00:00
Fields marked with
*
are required
Entry time:
Sat Nov 15 21:32:02 2025
Author
*
:
Subject
*
:
> ------17.2.17 ------------------------------------------------------ > > closing chamber > use Leak testing pump > 16.50 p = 0.6 mbar --> starting Turbo pump > > 18.25 Turbo @ 30kRPM, 33W > Pressure 7.0E-04mbar, backing pressure (leak tester) 0.1mbar > > > ------18.2.17 ------------------------------------------------------ > > 12.30 Turbo @ 42kRPM, 25W > Pressure 6.0E-05mbar, backing pressure (leak tester) 0.1mbar > FL601 started , temperature 25.8 deg C, set point -5.0 deg C > > 16.10 Turbo @ 42kRPM, 18W > Pressure 1.8E-05mbar, backing pressure (leak tester) 9.3E-2mbar > FL601 set point -5.0 deg C, actual -1.6 deg C > > 19.2.17 > > 12.20 Turbo @ 42kRPM, 15W > Pressure 1.5E-05mbar, backing pressure (leak tester) 9.3E-2mbar > FL601 set point -5.0 deg C, actual -2.0 deg C > > ------20.2.17 ------------------------------------------------------- > > 14.30 Turbo @ 42kRPM, 14W > Pressure 1.2E-05mbar, backing pressure (leak tester) 9.2E-2mbar > FL601 set point -5.0 deg C, actual -2.3 deg C > > 21.2.17 > > 10.10 Turbo @ 42kRPM, 14W > Pressure 1.1E-05mbar, backing pressure (leak tester) 9.2E-2mbar > FL601 set point -5.0 deg C, actual -2.5 deg C > > 16.30 Turbo @ 42kRPM, 13W > Pressure 1.0E-05mbar, backing pressure (leak tester) 9.2E-2mbar > FL601 set point -5.0 deg C, actual -2.4 deg C > > -----22.2.17 ------------------------------------------------------- > > 11.00 Turbo @ 42kRPM, 13W > Pressure 1.0E-05mbar, backing pressure (leak tester) 9.2E-2mbar > FL601 set point -5.0 deg C, actual -2.4 deg C > > 11.02 +/-15V preamp power ON > > 11.06 Pressure 1.2E-05mbar, FL601 actual temp -1.8 deg C > > 11.12 Pressure 1.3E-05mbar, FL601 actual temp -1.4 deg C > > 14.01 Pressure 1.5E-05mbar, FL601 actual temp -1.0 deg C > > 14.02 +/-15V preamp power OFF > > 14.15 Pressure 1.1E-05mbar, FL601 actual temp -1.9 deg C > > 15.27 Pressure 1.0E-05mbar, FL601 actual temp -2.0 deg C > > ------23.2.17 ----------------------------------------------------- > > 14.40 Pressure 8.6E-06mbar, FL601 actual temp -2.4 deg C > > 17.10 Pressure 8.1E-06mbar, FL601 actual temp -2.5 deg C > > ------24.2.17 ----------------------------------------------------- > > 13.08 Turbo @ 42kRPM, 13W > Pressure 7.0E-06mbar, backing pressure (leak tester) 9.1E-2mbar, leak rate 3.3E-10 mbar.l/s > FL601 set point -5.0 deg C, actual -2.2 deg C > > 14.30 Pressure 6.8E-06mbar, FL601 actual temp -2.5 deg C > +/-15V preamp power ON > > 14.49 Pressure 9.9E-06mbar, FL601 actual temp -1.0 deg C > > 17.44 Pressure 1.1E-05mbar, FL601 actual temp -1.0 deg C > > 19.00 Pressure 1.1E-05mbar, FL601 actual temp -1.0 deg C > +/-15V preamp power OFF > > ------26.2.17 --------------------------------------------------- > > 11.44 Turbo @ 42kRPM, 13W > Pressure 7.5E-06mbar, backing pressure (leak tester) 9.1E-2mbar, leak rate 1.8E-10 mbar.l/s > FL601 set point -5.0 deg C, actual -2.0 deg C > +/-15V preamp power ON > > 14.02 Pressure 1.2E-05mbar, FL601 actual temp -0.9 deg C > > > 18.19 +/-15V preamp power OFF > Pressure 1.2E-05mbar, FL601 actual temp -0.9 deg C > > ------27.2.17 --------------------------------------------------- > > 11.44 Turbo @ 42kRPM, 13W, 0.7A, 33 degree > Pressure 6.8E-06mbar, backing pressure (leak tester) 9.1E-2mbar, leak rate 1.3E-10 mbar.l/s > FL601 set point -5.0 deg C, actual -2.4 deg C > > 13.15 pressure 6.7E-06mbar; > > Turn off Turbo pump and open chamber! > ################################################################## > ################################################################## > > > ------2.3.17------------------------------------------------------ > > using leak testing pump as backing/pre pump (start it with open valve --otherwise there will be alarm signal of leak > rate changing dramatically) > showing some time scales for pumping (p_back is the pressure measured in backing pump and p_TC2 is the second gauge > plugged and measured inside the chamber > > 16.03 p_back = 39mbar; p_TC2 = 1.0E+03mbar > 16.29 p_back = 1.3mbar; p_TC2 = 8.4E+02mbar > 16.45 p_back = 0.8mbar; p_TC2 = 6.7E+02mbar > 16.59 p_back = 0.6mbar; p_TC2 = 4.1E+02mbar > > 18.26 p_back = 0.2mbar; p_TC2 = 4.0E+00mbar > --> starting Turbopump (accelerating up with safety check step in between) > 18.30 p_back = 0.3mbar; p_TC2 = 3.5E+00mbar > (release more gas from the chamber into pipe by TP) > 18.34 Turbo @ I=1.8A, P=28W, 7 kRPM, 27 deg C > p_TC2 = 1.9E+00mbar > 18.38 Turbo @ I=6.0A, upto P=90W, 10 kRPM, 29 deg C > 18.42 Turbo @ I=2.5A, P=38W, 11 kRPM, 29 deg C > p_TC2 = 5.5E-01mbar > 18.55 Turbo @ I=1.1A, P=17W, 15 kRPM, 31 deg C > p_TC2 = 4.1E-02mbar > 18.59 Turbo @ I=4.5A, P=82W, 19 kRPM, 31 deg C > p_TC2 = 2.3E-02mbar > > > ------3.3.17------------------------------------------------------- > > 11.05 Turbo @ 42kRPM, 13W > Pressure 5.5E-05mbar, FL601 ON > FL601 set point -5.0 deg C, actual +24 deg C > > > +/-15V preamp power ON > > 14.15 Turbo @ 42kRPM, 0.7A, 14W, 33 deg C > Pressure 1.2E-05mbar, backing pressure (leak tester) 9.2E-2mbar, leak rate between 2E-12 and 1.4E-11 mbar.l/s > FL601 set point -5.0 deg C, actual -1.4 deg C > > 14.30 Adding insulation to water pipe and try to deflect hot air from chiller away from cold pipes > > 14.40 - 15.40: +/-15V preamp power ON > > 15.00 Turbo @ 42kRPM, 0.8A, 16W, 33 deg C > Pressure 1.8E-05mbar > FL601 set point -5.0 deg C, actual -0.7 deg C > > 15.40 Turbo @ 42kRPM, 0.8A, 17W, 33 deg C > Pressure 2.1E-05mbar > FL601 set point -5.0 deg C, actual -0.6 deg C > > 16.10 Turbo @ 42kRPM, 0.7A, 14W, 33 deg C > Pressure 1.2E-05mbar > FL601 set point -5.0 deg C, actual -1.6 deg C > > 17.30 Turbo @ 42kRPM, 0.7A, 14W, 33 deg C > Pressure 1.1E-05mbar > FL601 set point -5.0 deg C, actual -1.7 deg C > > > ------06.03.17 ---------------------------------------------- > > power fluctuations turned off the chiller > > 13.42 Turbo @ 42kRPM, 1.0A, 19W, 33 deg C > Pressure 2.2E-05mbar > FL601 off. > Turn on FL601, which went from -5.0 up to actual +0.1 deg C and started cooling again. > > visible impact on the pressure: > > 13.46 Turbo @ 42kRPM, 1.0A, 18W, 33 deg C > Pressure 1.1E-05mbar > FL601 set point -5.0 deg C, actual -0.1 deg C > > 14.04 Turbo @ 42kRPM, 0.7A, 14W, 33 deg C > Pressure 8.7E-06mbar > FL601 set point -5.0 deg C, actual -1.6 deg C > > 14.26 Turbo @ 42kRPM, 0.7A, 13W, 33 deg C > Pressure 8.2E-06mbar > FL601 set point -5.0 deg C, actual -2.0 deg C > > Adding alcohol and water to cooling reservoir up to limit (full reservior), temperature went up due to room > temperature of added liquids > > 14.44 temp -0.6 deg C > 14.49 temp -2.7 deg C > 14.52 temp -3.6 deg C > added more alcohol! (one small bottle and a bit of the rest in IPA bottle) > > 15.00 temp -3.8 deg C > > 15.01 Turbo @ 42kRPM, 0.7A, 13W, 33 deg C > Pressure 7.9E-06mbar > FL601 set point -5.0 deg C, actual -4.1 deg C > > 15.12 Turbo @ 42kRPM, 0.7A, 13W, 33 deg C > Pressure 7.4E-06mbar > FL601 set point -5.0 deg C, actual -5.3 deg C > > 15.14 set point to -10.0 deg C > > 15.22 Turbo @ 42kRPM, 0.7A, 13W, 33 deg C > Pressure 7.3E-06mbar > FL601 set point -10.0 deg C, actual -6.3 deg C > > 16.03 Turbo @ 42kRPM, 0.6A, 12W, 33 deg C > Pressure 6.9E-06mbar, p_back = 9.1E-02mbar, leak rate 6.2E-11 mbar *l/s > FL601 set point -10.0 deg C, actual -9.9 deg C > > 17.00 Turbo @ 42kRPM, 0.6A, 12W, 33 deg C > Pressure 6.7E-06mbar > FL601 set point -15.0 deg C, actual -10.3 deg C > > 17.38 Turbo @ 42kRPM, 0.6A, 12W, 33 deg C > Pressure 6.7E-06mbar, p_back = 9.1E-02mbar > FL601 set point -15.0 deg C, actual -10.2 deg C > --> reach minimum temp due to not enough alcohol --> set point to -10.0 deg C > > 17.41 Turn +/-15V preamp power ON > > 17.46 Turbo @ 42kRPM, 0.6A, 12W, 32 deg C > Pressure 7.2E-06mbar, p_back = 9.1E-02mbar, leak rate 8.3E-11 mbar *l/s > FL601 set point -10.0 deg C, actual -8.6 deg C > > 18.17 Turbo @ 42kRPM, 0.7A, 14W, 32 deg C > Pressure 1.0E-05mbar, p_back = 9.2E-02mbar, leak rate 2.3E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -8.0 deg C > > 18.44 Turbo @ 42kRPM, 0.8A, 15W, 33 deg C > Pressure 1.1E-05mbar, p_back = 9.2E-02mbar, leak rate 2.4E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -7.7 deg C > > 18.45 Turn +/-15V preamp power OFF > > 19.35 Turbo @ 42kRPM, 0.6A, 12W, 33 deg C > Pressure 7.1E-06mbar, p_back = 9.1E-02mbar, leak rate 1.7E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -9.8 deg C > > ------07.03.17 ---------------------------------------------- > > 12.13 Turbo @ 42kRPM, 0.7A, 12W, 32 deg C > Pressure 6.5E-06mbar, p_back = 9.1E-02mbar, leak rate 1.2E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -10.0 deg C > > 12.15 Turn +/-15V preamp power ON > > 12.31 Turbo @ 42kRPM, 0.7A, 14W, 32 deg C > Pressure 8.6E-06mbar, p_back = 9.1E-02mbar, leak rate 1.3E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -8.6 deg C > > 13.22 Turbo @ 42kRPM, 0.8A, 15W, 32 deg C > Pressure 1.0E-05mbar, p_back = 9.2E-02mbar, leak rate 1.8E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -6.8 deg C > > 13.41 Turbo @ 42kRPM, 0.8A, 15W, 32 deg C > Pressure 1.0E-05mbar, p_back = 9.2E-02mbar, leak rate 1.9E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -6.9 deg C > > 14.35 Turbo @ 42kRPM, 0.8A, 15W, 33 deg C > Pressure 1.0E-05mbar, p_back = 9.2E-02mbar, leak rate 1.7E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -7.3 deg C > > 15.24 Turbo @ 42kRPM, 0.8A, 14W, 33 deg C > Pressure 1.0E-05mbar, p_back = 9.2E-02mbar, leak rate 1.8E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -7.3 deg C > > 16.05 Turbo @ 42kRPM, 0.8A, 14W, 33 deg C > Pressure 1.0E-05mbar, p_back = 9.2E-02mbar, leak rate 1.8E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -7.4 deg C > > 17.56 Turbo @ 42kRPM, 0.8A, 14W, 33 deg C > Pressure 1.0E-05mbar, p_back = 9.2E-02mbar, leak rate 1.7E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -7.6 deg C > > 18.14 Turn +/-15V preamp power OFF > > 18.18 Turbo @ 42kRPM, 0.7A, 14W, 33 deg C > Pressure 9.1E-06mbar, p_back = 9.2E-02mbar, leak rate 1.6E-10 mbar *l/s > (decreased after a big outgasing (E-09) just shortly after turning preamp power) > FL601 set point -10.0 deg C, actual -7.5 deg C > > ------08.03.17 -------------------------------------------------------------- > > 12.00 Turbo @ 42kRPM, 1.0A, 18W, 34 deg C > Pressure 6.2E-06mbar, p_back = 9.1E-02mbar, leak rate 7.9E-11 mbar *l/s > FL601 set point -10.0 deg C, actual -9.7 deg C > > Power on Turbo pump higher than usual, although pressure is at its lowest since. > Checked cycle time = 8261 min = 137.68 hours = 5.74 days > pump life = 31107 h > > Release a bit of coolant to check the concentration in chemistry lab: > density of mixture = 0.965 g/cm3 at temperature of 19.3 degree > > concentration of alcohol: x = (density_mixture - density_water)/(density_ethanol - density_water) > = (0.965 - 0.998)/(0.79 - 0.998) > = 0.159 > around 16% alcohol --> freezing temp should be around -7 to -8 degree C > > 13.46 Turbo @ 42kRPM, 1.0A, 18W, 35 deg C > Pressure 6.1E-06mbar, p_back = 9.1E-02mbar, leak rate 8.6E-11 mbar *l/s > FL601 set point -10.0 deg C, actual -9.2 deg C > > 15.30 Turbo @ 42kRPM, 0.8A, 15W, 35 deg C > Pressure 6.1E-06mbar, p_back = 9.1E-02mbar, leak rate 9.3E-11 mbar *l/s > FL601 set point -10.0 deg C, actual -9.6 deg C > > 15.37 Turn +/-15V preamp power ON > > 16.38 Turbo @ 42kRPM, 0.8A, 17W, 35 deg C > Pressure 9.4E-06mbar, p_back = 9.1E-02mbar, leak rate 1.5E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -7.0 deg C > > 16.39 Turn +/-15V preamp power OFF > > ------09.03.17 -------------------------------------------------------------- > > 11.21 Turbo @ 42kRPM, 0.7A, 15W, 35 deg C > Pressure 6.1E-06mbar, p_back = 9.1E-02mbar, leak rate 8.6E-11 mbar *l/s > FL601 set point -10.0 deg C, actual -9.6 deg C (fluctuations between -10.0 and -9.3 degree C) > > 11.22 Turn +/-15V preamp power ON > > 14.18 Turbo @ 42kRPM, 0.8A, 17W, 35 deg C > Pressure 9.3E-06mbar, p_back = 9.1E-02mbar, leak rate 1.7E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -7.4 deg C > > 14.39 Turbo @ 42kRPM, 0.9A, 17W, 35 deg C > Pressure 9.4E-06mbar, p_back = 9.1E-02mbar, leak rate 1.6E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -7.4 deg C > > 14.40 Turn +/-15V preamp power OFF > > 14.50 Turbo @ 42kRPM, 0.8A, 16W, 35 deg C > Pressure 7.4E-06mbar, p_back = 9.1E-02mbar, leak rate 1.2E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -8.3 deg C > > 15.00 Turbo @ 42kRPM, 0.8A, 16W, 35 deg C > Pressure 6.9E-06mbar, p_back = 9.1E-02mbar, leak rate 1.3E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -9.2 deg C > > 17.14 Turbo @ 42kRPM, 0.8A, 15W, 35 deg C > Pressure 6.1E-06mbar, p_back = 9.1E-02mbar, leak rate 9.9E-11 mbar *l/s > FL601 set point -10.0 deg C, actual -10.0 deg C > > 17.58 Turbo @ 42kRPM, 0.8A, 15W, 34 deg C > Pressure 6.0E-06mbar, p_back = 9.1E-02mbar, leak rate 4.2E-10 mbar *l/s (did some Helium leak checking) > FL601 set point -10.0 deg C, actual -9.9 deg C > > ------10.03.17 -------------------------------------------------------------- > > 10.55 Turbo @ 42kRPM, 0.8A, 15W, 35 deg C > Pressure 6.0E-06mbar, p_back = 9.1E-02mbar, leak rate 1.0E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -10.2 deg C > > 12.01 Turbo @ 42kRPM, 0.7A, 15W, 35 deg C > Pressure 5.9E-06mbar, p_back = 9.1E-02mbar, leak rate 1.1E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -10.0 deg C > > 12.07 leak rate dropped to 3.0E-12 just occasionly > > 13.07 Turbo @ 42kRPM, 0.7A, 15W, 34 deg C > Pressure 5.8E-06mbar, p_back = 9.1E-02mbar, leak rate 3.5E-10 mbar *l/s (after leak check - suspious about UP > and DOWN ribbon cable flanges) > FL601 set point -10.0 deg C, actual -10.1 deg C > > 13.07 Turn +/-15V preamp power ON > > 14.56 Turbo @ 42kRPM, 0.8A, 17W, 34 deg C > Pressure 9.0E-06mbar, p_back = 9.1E-02mbar, leak rate 6.3E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -7.2 deg C > > 14.56 Turn +/-15V preamp power OFF > > 17.10 Turbo @ 42kRPM, 0.8A, 15W, 34 deg C > Pressure 5.9E-06mbar, p_back = 9.1E-02mbar, leak rate 2.9E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -10.1 deg C > > 17.40 Turbo @ 42kRPM, 0.8A, 15W, 34 deg C > Pressure 5.7E-06mbar, p_back = 9.1E-02mbar, leak rate 7.4.9E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -10.2 deg C > > ------13/03/17 --------------------------------------------------------------- > > 11.40 Turbo @ 42kRPM, 0.8A, 15W, 34 deg C > Pressure 6.3E-06mbar, p_back = 9.1E-02mbar, leak rate 9.4E-11 mbar *l/s > FL601 set point -10.0 deg C, actual -10.1 deg C > --> pressure went up over the weekend??????????????? (Room temperature can be the reason) > > 15.53 Turbo @ 42kRPM, 0.8A, 15W, 34 deg C > Pressure 6.1E-06mbar, p_back = 9.1E-02mbar, leak rate 1.5E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -10.1 deg C > > > > ------14/03/17 --------------------------------------------------------------- > > 09.38 Turbo @ 42kRPM, 0.7A, 15W, 35 deg C > Pressure 6.3E-06mbar, p_back = 9.1E-02mbar, leak rate 1.1E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -9.9 deg C > > 09.39 Turn +/-15V preamp power ON > > 11.14 Turbo @ 42kRPM, 0.8A, 17W, 35 deg C > Pressure 8.9E-06mbar, p_back = 9.1E-02mbar, leak rate 1.8E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -7.1 deg C > > 11.30 Turbo @ 42kRPM, 0.8A, 17W, 35 deg C > Pressure 8.7E-06mbar, p_back = 9.1E-02mbar, leak rate 1.8E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -6.8 deg C > > 11.30 Turn +/-15V preamp power OFF > > Adding same silicone vacuum leak sealant (Aerosol) to the Upstream cable connections (suspious leak) > > 13.30 Turbo @ 42kRPM, 0.8A, 15W, 34 deg C > Pressure 6.2E-06mbar, p_back = 9.1E-02mbar, leak rate 1.0E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -9.8 deg C > > > > ------15/03/17 --------------------------------------------------------------- > > 10.50 Turbo @ 42kRPM, 0.7A, 15W, 35 deg C > Pressure 6.2E-06mbar, p_back = 9.1E-02mbar, leak rate 1.2E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -10.0 deg C > Fluke Thermometer(thermocoupling to preamp board) = 0.3 deg C > > 13.30 Turbo @ 42kRPM, 0.8A, 15W, 35 deg C > Pressure 5.9E-06mbar, p_back = 9.1E-02mbar, leak rate 9.9E-11 mbar *l/s > FL601 set point -10.0 deg C, actual -10.1 deg C > > 13.48 Leak test of lower 2/3 of BNC connections, when leak risen slowly from 2E-10 to 3E-09 in like 10minutes. > At same time p(TC1) raised for some second up to 9E-06mbar, which could indicate a huge outgasing) > > 14.04 Turbo @ 42kRPM, 0.7A, 15W, 35 deg C > Pressure 6.0E-06mbar, p_back = 9.1E-02mbar, leak rate 3.4E-09 mbar *l/s > FL601 set point -10.0 deg C, actual -9.7 deg C > > 16.36 Turbo @ 42kRPM, 0.7A, 15W, 34 deg C > Pressure 5.9E-06mbar, p_back = 9.1E-02mbar, leak rate 5.9E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -9.9 deg C > > > > ------16/03/17 --------------------------------------------------------------- > > 11.49 Turbo @ 42kRPM, 0.8A, 15W, 34 deg C > Pressure 6.1E-06mbar, p_back = 9.1E-02mbar, leak rate 1.8E-10 mbar *l/s > FL601 set point -10.0 deg C, actual -10.1 deg C > > 13.11 Turbo @ 42kRPM, 0.8A, 15W, 34 deg C > Pressure 6.0E-06mbar, p_back = 9.1E-02mbar, leak rate 1.4E-08 mbar *l/s (leak test Toby - found bad o-ring > connection back side downstream end) > FL601 set point -10.0 deg C, actual -9.7 deg C > > ----- Switched off TP 15.34 (peter changed Fan of TP controller, new Targetholder did not fit perfectly, so still with > old one, investigation on o-ring leak --> maybe small dust particle) > 15.53 chamber close, Roughing pump with bigger pipe ON, 16.02 Turn on TP (Soft start) > > 16.30 Pressure 1.1E-03mbar (Turbo @ 15kRPM, 0.6A, 10W, 34 deg C) > 16.55 Pressure 5.2E-04mbar (Turbo @ 27kRPM, 0.6A, 17W, 35 deg C) > 17.32 Pressure 2.8E-04mbar (Turbo @ 42kRPM, 0.6A, 27W, 37 deg C) > 18.21 Pressure 2.2E-04mbar (Turbo @ 42kRPM, 0.6A, 20W, 38 deg C) > > 18.23 pressure = 2.E-04 --> start FL601set point -10.0 deg C, actual -6.5 went up to - 1.5 deg C (start equilibrium) > > 18.27 Pressure 1.6E-04mbar (Turbo @ 42kRPM, 0.9A, 19W, 38 deg C) > FL601 set point -10.0 deg C, actual -2.2 deg C > > 18.40 Pressure 1.3E-04mbar (Turbo @ 42kRPM, 0.9A, 19W, 39 deg C) > FL601 set point -10.0 deg C, actual -5.5 deg C > (temperature of TP could have indicated a leak...) > > > ------17/03/17 Friday--------------------------------------------------------------- > > 09.37 Pressure 1.2E-04mbar (Turbo @ 42kRPM, 0.9A, 15W, 40 deg C) > FL601 set point -10.0 deg C, actual -9.6 deg C > LEAK? (screws on targetholder were not secured enough) > > 09.43 Pressure 5.4E-05mbar (Turbo @ 42kRPM, 0.6A, 13W, 40 deg C) > FL601 set point -10.0 deg C, actual -9.6 deg C > > 10.40 Pressure 5.5E-05mbar (Turbo @ 42kRPM, 0.7A, 13W, 40 deg C) > FL601 set point -10.0 deg C, actual -9.7 deg C > Helium test: o-ring (downstream end) front top part 10^-9 to 10^-5 (big leak --> no pressure improvement) > > 11.06 Turn off FL601 > 14.35 Turn off TP > ################################################################################### > OPEN CHAMBER: Removed pre amp board U1-U4. > over weekend close chamber with roughing pump (~5.0E-01mbar) > > ------20/03/17 Monday--------------------------------------------------------------- > > CHANGED/SWITCHED UP and DOWN board inside the chamber. > > New UP (1-8) and new DOWN (5-8) > > Distance measurements: > > > > > ------17/03/17 Friday--------------------------------------------------------------- > > 09.37 Pressure 1.2E-04mbar (Turbo @ 42kRPM, 0.9A, 15W, 40 deg C) > FL601 set point -10.0 deg C, actual -9.6 deg C > LEAK? (screws on targetholder were not secured enough) > > 09.43 Pressure 5.4E-05mbar (Turbo @ 42kRPM, 0.6A, 13W, 40 deg C) > FL601 set point -10.0 deg C, actual -9.6 deg C > > 10.40 Pressure 5.5E-05mbar (Turbo @ 42kRPM, 0.7A, 13W, 40 deg C) > FL601 set point -10.0 deg C, actual -9.7 deg C > Helium test: o-ring (downstream end) front top part 10^-9 to 10^-5 (big leak --> no pressure improvement) > > 11.06 Turn off FL601 > 14.35 Turn off TP > ################################################################################### > OPEN CHAMBER: Removed pre amp board U1-U4. > over weekend close chamber with roughing pump (~5.0E-01mbar) > > ------20/03/17 Monday--------------------------------------------------------------- > > CHANGED/SWITCHED UP and DOWN board inside the chamber. > > New UP (1-8) and new DOWN (5-8) > > Distance measurements: > > New UPstream: (metal frame stand off = 10mm) > Position (to end of chamber): 738 - 40 (pos from target) - 32 (plastic standoff) + 10 = 676 (to end of board) > > Orientation: > > 4 > 3 > > 6 2 > 5 1 > > 7 > 8 > > > New DOWNstream: (metal frame stand off = 20mm) > Position (to end of chamber): 738 - 400 (pos from target) - 14 (plastic standoff) + 20 = 344 (to end of board) > > > Orientation: > > > > > 6 > 5 > > 7 > 8 > > > ***note: 24/03/17: took short standoff for UPstream hold (only ~40mm to targetholder) > remeasured short standoffs: 12.5mm > > > Checked: Cooling (changed circle with one preamp board less), cabling (preamp power signal), > position, cleaning, test preamp > CABLING changed 16-x19 to D5-8 > > 14.30 close chamber, start roughing pump > 15.24 p(TC2) = 4.4E-01 mbar --> soft start big Turbo Pump > 15.39 p = 1.6 E-03mbar (0.7A, 11W, 11kRPM, 27 deg C) > 16.11 p = 5.9 E-04mbar (0.6A, 14W, 23kRPM, 29 deg C) > 16.33 p = 3.4 E-04mbar (1.3A, 38W, 34kRPM, 31 deg C) > 17.41 p = 1.7 E-04mbar (0.9A, 18W, 42kRPM, 35 deg C) > > Turn on FL601 cooling, set point to -5.0 deg C, actual temp starts at 22 deg C > > 19.12 Pressure 5.9E-05mbar (Turbo @ 42kRPM, 0.6A, 10W, 35 deg C) > FL601 set point -5.0 deg C, actual -4.6 deg C > --> changed set point to -10.0 deg C > > ------21/03/17 Tuesday--------------------------------------------------------------- > > 10.52 p = 1.9 E-05 mbar > --> switch on small Turbo pump (TP2) > > 11.05 Pressure 1.3E-05mbar (Turbo @ 42kRPM, 0.5A, 10W, 35 deg C; TP2 @ 75kRPM, 0.25A, 13W, 32 deg C) > FL601 set point -10.0 deg C, actual -5.5 deg C > --> Turn ±15V preamp power ON > Testing DAQ > > 11.45 Pressure 2.0E-05mbar (Turbo @ 42kRPM, 0.5A, 10W, 35 deg C; TP2 @ 75kRPM, 0.26A, 13W, 39 deg C) > FL601 set point -10.0 deg C, actual -3.9 deg C > > 12.17 Turn ±15V preamp power OFF > Pressure 1.9E-05mbar (Turbo @ 42kRPM, 0.5A, 10W, 35 deg C; TP2 @ 75kRPM, 0.26A, 13W, 43 deg C) > FL601 set point -10.0 deg C, actual -4.0 deg C > > 14.18 Pressure 1.2E-05mbar (Turbo @ 42kRPM, 0.5A, 10W, 35 deg C; TP2 @ 75kRPM, 0.25A, 13W, 45 deg C) > FL601 set point -10.0 deg C, actual -5.6 deg C > > added some alcohol(mixing takes a short heat up), switch to helium leak tester (DONT MOVE WHILE IT IS ON) > added FAN for small Turbopump > > 15.40 Pressure 1.1E-05mbar (Turbo @ 42kRPM, 0.5A, 9W, 35 deg C; TP2 @ 75kRPM, 0.24A, 12W, 33 deg C) > FL601 set point -10.0 deg C, actual -6.0 deg C > > 17.05 Pressure 1.0E-05mbar (Turbo @ 42kRPM, 0.5A, 9W, 34 deg C; TP2 @ 75kRPM, 0.24A, 12W, 34 deg C) > FL601 set point -10.0 deg C, actual -7.6 deg C > > 17.05 Turn ±15V preamp power ON > > 18.51 Pressure 1.6E-05mbar (Turbo @ 42kRPM, 0.5A, 9W, 34 deg C; TP2 @ 75kRPM, 0.24A, 12W, 34 deg C) > FL601 set point -10.0 deg C, actual -5.3 deg C > > 18.51 Turn ±15V preamp power OFF > > > ------22/03/17 Wednesday--------------------------------------------------------------- > > 10.55 Pressure 7.9E-06mbar (Turbo @ 42kRPM, 0.5A, 8W, 35 deg C; TP2 @ 75kRPM, 0.22A, 11W, 33 deg C) > p_back = 9.2E-02mbar, leak rate 10E-11 - 10E-12 mbar*l/s > FL601 set point -10.0 deg C, actual -7.7 deg C > > 14.05 pressure 7.7E-06mbar > > OPEN CHAMBER FOR ALIGNMENT > > ------23/03/17 Thursday--------------------------------------------------------------- > > Si-Detectors: measures- DeltaE-E (65µm - 1000µm) and Downstream E (74µm) > HANDLE WITH CARE, NO TENSION --> THIN LAYERS. > > Voltage supply: 24V for 74µm. BIAS cable is 4th row and 2nd place > > Cabled to U1-4. DONT FLAT THE CHAMBER WITH LOTS OF AIR, use valve at TP. > > > > ------24/03/17 Friday--------------------------------------------------------------- > > Testing Preamps (with Si-"capacitor" - no BIAS) under atmosphere with 5 deg C cooling > Normal resolution with pulser and without Si-Detector = 2-3 channel > > Without BIAS: > #1 adc 0-13: FWHM ~10ch > #1 adc 14,15: Broken > #1 adc 16-31: FWHM ~7ch > > #2 adc 0-6: FWHM ~27ch > #2 adc 7,8: FWHM ~5-6ch only > #2 adc 9-14: FWHM ~30ch (2peaks each; low peak coming from wrong pulser signal.) > #2 adc 13: FWHM ~90ch > #2 adc 15: FWHM ~27ch > > #2 adc 16-31: 8-10ch > except from #2 adc 22,28: ~27ch > > Quad BIAS Supply: > 0V - 0.20µA > 5V - 0.82µA > 10V - 0.95µA > 15V - 1.07µA > 20V - 1.17µA > 24V - 1.25µA > > With BIAS: > #1 adc 0-31(14,15 broken): FWHM 4-6ch > > #2 adc 0-15: FWHM ~ 7ch > except from #2 adc 3,4,7,8,12 with lower tail: FWHM ~7-10ch > > #2 adc 16-31: FWHM ~4-6ch > except 22,38: FWHM ~10ch > except 13: FWHM ~25ch > > > Targetholder (alignment) marker on scale > > pos-1: 34.54 (bottom on ladder) > > pos-2: 94.05 (middle) > > pos-3: bottom.8 (almost maximum, top on ladder) > > > New run with alpha source P32 R9344 mixed (only Gold sealing --> wear Cloves) > (Pu-239, - 5.155MeV > Am-241, - 5.486MeV > Cm-244, - 5.805MeV) > > 17.15 Close Chamber, roughing pump > > 17.28 p = 9.9E-01mbar --> Start TP (big) > 17.48 p = 2.0E-03mbar (TP @ 11kRPM, 0.7A, 12W, 28 deg C > > > ------25/03/17 Saturday--------------------------------------------------------------- > > 15.00 Pressure 4.6E-05mbar (Turbo @ 42kRPM, 0.6A, 11W, 34 deg C) > --> start small TP2 and open valve (quick soft start in 1 minute) - TP2 @ 75kRPM, 0.24A, 12W, 26 deg C) > start FL601 set point -10.0 deg C, actual 20.7 deg C > > 15.05 p = 3.8E-05 mbar > 15.07 p = 3.4E-05 mbar > > > > ------27/03/17 Monday--------------------------------------------------------------- > > 12.17 Pressure 6.2E-06mbar (Turbo @ 42kRPM, 0.8A, 14W, 36 deg C; TP2 @ 75kRPM, 0.22A, 11W, 32 deg C) > FL601 set point -10.0 deg C, actual -8.4 deg C > > 12.21 Turn ±15V preamp power ON > > 14.05 Pressure 8.7E-06mbar (Turbo @ 42kRPM, 0.8A, 13W, 36 deg C; TP2 @ 75kRPM, 0.22A, 11W, 32 deg C) > FL601 set point -10.0 deg C, actual -5.0 deg C > > 14.43 Pressure 8.7E-06mbar (Turbo @ 42kRPM, 0.8A, 13W, 36 deg C; TP2 @ 75kRPM, 0.22A, 11W, 32 deg C) > FL601 set point -10.0 deg C, actual -5.1 deg C > > 14.44 Turn ±15V preamp power OFF > > 16.25 Pressure 6.1E-06mbar (outgazing still ongoing, saw peak up to 2.3E-05mbar at a glimpse) > (Turbo @ 42kRPM, 0.8A, 13W, 36 deg C; TP2 @ 75kRPM, 0.22A, 11W, 32 deg C) > FL601 set point -10.0 deg C, actual -7.3 deg C > > ------28/03/17 Tuesday--------------------------------------------------------------- > > 13.06 Pressure 5.7E-06mbar (Turbo @ 42kRPM, 0.8A, 14W, 35 deg C; TP2 @ 75kRPM, 0.22A, 11W, 32 deg C) > FL601 set point -10.0 deg C, actual -9.4 deg C > > 13.09 Turn ±15V preamp power ON > > 16.15 Pressure 7.8E-06mbar (Turbo @ 42kRPM, 0.8A, 13W, 35 deg C; TP2 @ 75kRPM, 0.22A, 11W, 32 deg C) > FL601 set point -10.0 deg C, actual -5.8 deg C > > 16.16 Turn ±15V preamp power OFF > > 18.36 Pressure 6.1E-06mbar (Turbo @ 42kRPM, 0.7A, 13W, 35 deg C; TP2 @ 75kRPM, 0.22A, 11W, 32 deg C) > FL601 set point -10.0 deg C, actual -8.5 deg C > > > ------29/03/17 Wednesday--------------------------------------------------------------- > > 13.15 Pressure 5.9E-06mbar (Turbo @ 42kRPM, 0.7A, 13W, 35 deg C; TP2 @ 75kRPM, 0.22A, 11W, 32 deg C) > FL601 set point -10.0 deg C, actual -9.5 deg C > > 13.25 Turn ±15V preamp power ON for alpha measurement > > 14.30 Pressure 7.3E-06mbar (Turbo @ 42kRPM, 0.7A, 13W, 35 deg C; TP2 @ 75kRPM, 0.22A, 11W, 32 deg C) > FL601 set point -10.0 deg C, actual -7.6 deg C > > 15.41 Pressure 7.9E-06mbar (Turbo @ 42kRPM, 0.7A, 13W, 35 deg C; TP2 @ 75kRPM, 0.22A, 11W, 32 deg C) > FL601 set point -10.0 deg C, actual -6.6 deg C > > 16.31 Pressure 7.8E-06mbar (Turbo @ 42kRPM, 0.7A, 13W, 35 deg C; TP2 @ 75kRPM, 0.22A, 11W, 32 deg C) > FL601 set point -10.0 deg C, actual -6.4 deg C > good vacuum condition of ~8E-06mbar with preamps on > 16.31 Turn ±15V preamp power OFF > > 17.46 Pressure 6.1E-06mbar (Turbo @ 42kRPM, 0.7A, 12W, 35 deg C; TP2 @ 75kRPM, 0.22A, 11W, 32 deg C) > FL601 set point -10.0 deg C, actual -8.7 deg C > > > ------30/03/17 Thursday--------------------------------------------------------------- > > 12.15 Pressure 6.3E-06mbar (Turbo @ 42kRPM, 0.7A, 13W, 35 deg C; TP2 @ 75kRPM, 0.22A, 11W, 32 deg C) > FL601 set point -10.0 deg C, actual -9.8 deg C > shut off TP + TP2 --> spinning down > > 13.05 p = 3.1E-05mbar, turn off FL601, bringing down to atmosphere takes about 30 minutes. > > ########################### > 13.35 OPEN CHAMBER, longer cable done for detector, Peter add block (15.8mm) the target holder (due to pos 3) > put stand off on DOWNstream > > Test #3,#4 under atmosphere WITHOUT BIAS: > #3 adc 0 lower xmean ~ 1550, FWHM ~20ch > #19 low xmean ~450, FWHM ~3ch > rest of #3: xmean 2400-2600, FWHM ~10ch > > #4 xmean more or less between 2000-3000, most ~2400. > #4 adc 4: double peak, FWHM > 30ch > #4 adc 0 - 15: FWHM ~ 30ch, except of > #4 adc 7: FWHM ~8ch. > > #4 adc 16-31: FWHM ~12-13ch, right tail > except #4 adc 16: FWHM ~7ch > #4 adc 18: FWHM 15ch > #4 adc 25: FWHM ~20ch > > BIAS up to 24 V 1.38µA leak current (while ramp <3µA) > alpha source inside chamber on new middle position: 94.05 -15.8 = 78.25 > chamber close after 2h > > WITH BIAS: > #3 0-31: 4-6ch FWHM > except #3 adc 1: ~10ch FWHM > #3 adc 19: ~3ch FWHM (lower mean) > left tail: adc 0-23 and right tail: adc 24-31 > > #4 adc 0-15: broader: adc 0-4: ~7ch FWHM > adc 5: ~3ch FWHM > adc 6,13: 11ch FWHM > adc 7,15: ~5,6ch FWHM > adc 8-12,14: ~7,8ch FWHM > > #4 adc 16-31: 5-8ch FWHM right tail > > ############################################## > ################################closed chamber > > 16.10 Roughing pump slowly pump down (open value stepwise) > 16.25 p = 1.1 mbar --> start TP > 16.30 p = 1.3E-01 mbar (TP @ 7kRPM, 1.0A, 15W, 28 deg C) > 17.21 p = 7.8E-04 mbar (TP @ 27kRPM, 0.6A, 17W, 31 deg C) > 18.08 p = 3.3E-04 mbar (TP @ 42kRPM, 1.1A, 22W, 34 deg C) > --> start TP2 (1min) --> TP2 @ 75kRPM, 0.26A, 13W, 26 deg C) > 18.12 p = 2.7E-04 mbar > 18.16 start FL601 set to -10.0 deg C, starts at ~ +4.0 deg C > 18.18 p = 2.0E-04 mbar > 18.54 p = 8.8E-05 mbar (TP @ 42kRPM, 0.8A, 17W, 35 deg C; TP2 @ 75kRPM, 0.25A, 13W, 32 deg C) > FL601 set point -10.0 deg C, actual -5.5 deg C > > > ------31/03/17 Friday--------------------------------------------------------------- > > 10.35 p = 1.5E-05mbar > 12.15 p = 1.4E-05 mbar (TP @ 42kRPM, 0.6A, 12W, 35 deg C; TP2 @ 75kRPM, 0.22A, 11W, 32 deg C) > FL601 set point -10.0 deg C, actual -6.2 deg C > 12.30 Turn ±15V preamp power ON (for Outgazing and alpha measurement) > > 13.40 p = 2.2E-05 mbar; leak rate: 1.6E-09 mbar l /S > 14.15 p = 2.1E-05 mbar; T = -4.5 deg C > > TURN BIAS on 24V, 1.16µA > 14.17 DAQ started > #3 -19: low peak 181 with Amplitude of 478 (14.33), FWHM 4-5ch --> Area ~ 5500counts > rest #3 0-31: xmean ~ 1000, FWHM 8-12 ch > > #4 adc 6 and 7: no signal > --> adc 6 could be preamp problem > --> adc 7 could be Si-Det issue, because it was observed with #2adc7 before > #4 adc 5: low xmean = 134, FWHM 2.5ch > rest of #4 adc 0-15: (14.40) ~500-800 Amplitude, xmean ~ 1000, FWHM ~12ch > #4 adc 16-31: A~200-250, xmean ~ 950-1050; FWHM ~7-8ch > > > 14.45 p = 2.1E-05 mbar; Temp = -4.8 deg C; leak rate: 8.0E-10 mbar l /S > 14.46 Turn ±15V preamp power OFF, switch off Amps and BIAS > > 16.10 p = 1.3E-05 mbar; T = -6.2 deg C > > 18.23 p = 1.2E-05 mbar; T = -6.2 deg C > > > ------ > ------03/04/17 Monday ------------------- Peter testing ---------------- > > 15.49 p = 7.6E-06 mbar; > > ------04/04/17 Tuesday ------------------- > > 14.05 p = 7.1E-06 mbar; > > TP Off > > ------05/04/17 Wednesday ------------------- > ######################################## > ##### chamber open, alpha source out ### > > 10.25 chamber close, start pumping > 12.10 large TP ON > > 13.55 p = 9.4E-05 mbar > > 15.30 p = 5.7E-05 mbar > > ------06/04/17 Thursday ------------------- > > 09.50 p = 1.5E-05 mbar > > 15.30 p = 1.0E-05 mbar > > > ------07/04/17 Friday ------------------- > > 09.25 p = 9.1E-06 mbar (TP @ 42kRPM, 0.5A, 9W, 35 deg C; no TP2) > FL601 set point -10.0 deg C, actual -9.7 deg C > 09.25 Turn ±15V preamp power ON > > 12.02 p = 1.2E-05 mbar > T = -6.9 deg C > Turn ±15V preamp power OFF > > 12.13 p = 1.0E-05 mbar > T = -7.5 deg C > > 12.54 p = 9.0E-06 mbar > T = -8.5 deg C > > 15.04 p = 9.0E-06 mbar > T = -9.1 deg C > > 16.47 p = 8.6E-06 mbar > T = -9.3 deg C > > ########################## > ACCIDENT Registered on Sunday 09/04/17 ~10 am: > Power went down due to wiring problem > Tom C. closed valves, but chamber was probably already vented to atmosphere. > During power shut down roughing and turbo pump slowed down and turbo probably deaccelerate against atmosphere. > Possible back flows. > > > ------11/04/17 Tuesday ----------------- > OPEN CHAMBER 16.05: readjust Downstream plate to 326mm, cause we changed to longer stand-off > Downstream --> 74µm Si-Det > Upstream --> 500µm Si-Det > > Check DAQ/FWHM of spectra without BIAS on under atmosphere and only PULSER signal: > > > BIAS up (500µm): > Voltage[V] Leak current[µA] > 0 0.14 > 5 0.6 > 10 0.73 > 20 0.93 > 30 1.11 > 40 1.22 > 50 1.27 > 60 1.32 > 70 1.34 > 80 1.38 > 90 1.42 > 100 1.44 > 110 1.48 > 120 1.49 > 130 1.52 --> 1.44 (after 5 min) > > > Check DAQ/FWHM of spectra with BIAS on under atmosphere and only PULSER signal: > > > CLOSING CHAMBER > 18.03 Start roughing pump > 18.06 p = 1.0E+03 mbar > 18.11 p = 2.0E+01 mbar > 18.14 p = 3.8E+00 mbar > 18.16 p = 1.9E+00 mbar > 18.19 p = 1.1E+00 mbar --> start TP (and close valve at TP2) > 18.22 p = 5.0E-01 mbar > 18.25 p = 9.0E-02 mbar (took a while for next stage of acceleration... very slow start) > 18.34 p = 2.6E-03 mbar > 18.40 p = 2.2E-03 mbar > 18.44 p = 1.6E-03 mbar > 19.02 p = 1.0E-03 mbar > 19.12 p = 8.2E-04 mbar > 19.18 p = 7.6E-04 mbar > 19.21 p = 7.0E-04 mbar > 19.30 p = 5.7E-04 mbar > 20.00 p = 3.7E-04 mbar (full speed at TP @ 42 kRPM) > 20.04 TURN ON TP2 > 20.06 p = 3.0E-04 mbar > 20.10 p = 2.9E-04 mbar (TP @ 42kRPM, 0.9A, 18W, 34 deg C; TP2 @ 75kRPM, 0.28A, 15W, 28 deg C) > > ------12/04/17 Wednesday ----------------- > > 9.33 p = 6.1E-05 mbar > 10.27 p = 5.9E-05 mbar > Turn on FL601 chiller set to -5.0 deg C; T_start = 18.7 deg C > 10.44 p = 2.9E-05 mbar; T = 4.8 deg C > stop chiller to remove 500ml of Coolant and replace it with ~375ml IPA > 10.54 p = 2.7E-05 mbar; T = 3.4 deg C > > 11.08 p = 2.1E-05 mbar; T = -5.0 deg C (set to -10.0 deg C) > 11.15 Turn ±15V preamp power ON > > 11.29 p = 2.4E-05 mbar; T = -5.8 deg C > 11.50 p = 2.5E-05 mbar; T = -5.1 deg C > > BIAS up for UPSTREAM (500µm - 130 V) and DOWNSTREAM (74µm - 24 V) > 11.51 DAQ started for testing Si-det with triple alpha source > > 12.10 p = 2.4E-05 mbar; T = -5.1 deg C > 12.17 p = 2.5E-05 mbar; T = -5.2 deg C > 13.12 p = 2.3E-05 mbar; T = -5.2 deg C > 15.08 p = 2.1E-05 mbar; T = -5.1 deg C > 15.50 p = 2.0E-05 mbar; T = -5.1 deg C > > 15.58 DAQ stopped; ramp down BIAS, switch off amp+preamps > Turn ±15V preamp power OFF > > 16.02 p = 2.0E-05 mbar; T = -5.2 deg C > 16.35 p = 1.5E-05 mbar; T = -6.0 deg C > 17.04 p = 1.5E-05 mbar; T = -6.0 deg C > > 17.05 Turn ±15V preamp power ON > 17.19 p = 1.7E-05 mbar; T = -1.4 deg C (set to -2.0) > 17.19 Turn ±15V preamp power OFF > > 17.40 p = 1.5E-05 mbar; T = -5.7 deg C (after set to -10.0 deg C) > 18.14 p = 1.4E-05 mbar; T = -5.8 deg C > > ------13/04/17 Thursday ----------------- > > 11.37 p = 1.0E-05 mbar; T = -6.2 deg C > Turn ±15V preamp power ON > 13.21 p = 1.4E-05 mbar; T = -4.5 deg C > Turn ±15V preamp power OFF > add ~300ml IPA, set point to +5.0 deg C > > 13.44 p = 1.3E-05 mbar; T = 4.1 deg C > 14.33 p = 1.4E-05 mbar; T = 5.0 deg C > > 14.38 FL601 turn OFF, peter test cooling pipes with Helium (~4bar He --> leak rate up to 10^{-6} or 10^{-5} mbar*l/s > Test chiller in close circle: 15.05 T = -8.3 deg C > > open cooling pipe --> chamber without cooling: > 14.50 p = 2.0E-05 mbar > 15.05 p = 2.9E-05 mbar > 15.35 p = 4.0E-05 mbar (leak rate 5 * 10^{-5} mbar*l/s) > > 15.50 reconnect cooling to chamber > 15.55 p = 1.5E-05 mbar; T = -5.8 deg C; leak rate 2.0E-05 mbar*l/s > 16.55 p = 1.7E-05 mbar; Cooling was off by Daid to test temperature influence > > 17.00 p = 1.1E-05 mbar; T = -5.7 deg C (chiller back on) > 17.50 p = 1.0E-05 mbar; T = -6.6 deg C > 18.18 p = 1.0E-05 mbar; T = -6.8 deg C > > ------14/04/17 Friday ----------------- > > 11.09 p = 8.5E-06 mbar; T = -7.1 deg C > 11.15 Turn ±15V preamp power ON > > 12.10 p = 1.2E-05 mbar; T = -5.2 deg C switch to Helium leak pump: rate ~ 4.3E-09 mbar*l/s > > 12.29 p = 1.1E-05 mbar; T = -5.2 deg C > > Turn ±15V preamp power OFF > > 14.20 p = 8.5E-06 mbar; T = -7.2 deg C > > 14.50 Turn ±15V preamp power ON > > 15.05 p = 9.4E-06 mbar; T = -6.6 deg C; leak rate 5*10^{-09} mbar*l/s > 15.30 p = 1.0E-05 mbar; T = -5.7 deg C; leak rate 6.3*10^{-09} mbar*l/s > 15.50 p = 1.1E-05 mbar; T = -5.6 deg C; leak rate 7*10^{-09} mbar*l/s > 16.33 p = 1.1E-05 mbar; T = -5.5 deg C; leak rate 7.6*10^{-09} mbar*l/s
Encoding
:
HTML
ELCode
plain
Suppress Email notification
Attachment 1:
Drop attachments here...
Draft saved at 00:00:00
ELOG V3.1.3-7933898