22:27

Run 33 started cooled beam on target.

Detectors IN (left arm pot =36.5 mm, right arm pot = 70.49 mm)

Electron cooler voltage 754.945 this corresponds to 1.3499 MeV/u. This is above the resonance of interest but cooler settings cannot be altered without major beam tuning.

Target density is 4.1e11 at/cm2, ring pressure looks OK YR09 1.2e-10 mbar.

Horizontal beam position is -7.5 mm, vertical beam position is now 0.0 mm. This results in no beam halo in bottom left detector which should be good for seeing Rutherford.

Beam is in the ring for 8 seconds and total cycle time between injections is 12 seconds

FEE temperatures are OK. 3 FEEs are slightly too. (attachment 1)

System checks are OK.

Statistics look OK. High in the top left detector which is expected as majority of halo is there. (attachment 2+3)

Merger OK Tape server OK - 851 kB/s

Merger statistics (attachment 4)

Leakage current is increasing but is likely temperature related. ML temp plot has same pattern and it is a WARM day. (attachment 5)

Monitoring code - xy plot and Ey energy histograms (attachment 6+7). Rutherford rate looks higher -> looking peaky

00:14

System checks all OK

FEE temperatures unchanged. Tom has now set up plotting of aida09 fee temperatures in the second workspace.

Merger OK, tape server OK.

Target density remains about 4.1e11 at/cm2. Ring pressure ~1e-10 mbar. YR08 read close to 1e-9 but beam is able to circulate in the ring so will not change for now.

Rate statistics in all FEEs remain unchanged.

02:10

System checks OK

FEE temperatures unchanged

Merger OK

Target density OK. Ring pressure not great but cannot change remotely due to script not in screen and poor coding.

Beam stil on.

Leakage current trending up.

04.00 FEE64 temperatures - attachments 10-11

          aida09 ( and other FEE64s ) on downward trend

          CRYRING hall temperature - attachment 12

05:00

Ring pressure worsening and target getting thinner (4E11). Tweak nozzle when in the lab physically.

Beam still on around 3E7

Temperatures & Leakage currents OK. Same trends

Merger continues OK

Stats OK

System wide checks OK

07:00

Fee temperatures have reduced - all green

System check OK

ADC data items statistics unchanged. 

Merger and tape server OK

Leakage current plot (attachment 15)
monitoring  plots - xy plot and EY energy histogram (attachment 16+17 )

Pressure has dropped slightly over the last hour, target density remains stable 4.2e11. Beam transformer has dropped off in the last hour -> less beam target interactions -> lower pressure?

We still see count rates in the detectors.

08:18

Inconsistent beam into the ring continues. HKR are aware.

Temperatures OK

System checks OK

10:00

Beam is much more consistent now. We observe vast majority of shots injected into the ring and corresponding rate increase in the detectors via the monitoring code.

FEE temperatures OK

System wide checks OK

Merger and tape server OK

New merger stats (attachment 18)

ADC data item statistics OK

Leakage current plot (attachment 19)

Attachments 20+21: Cooler settings before and after changing to the new beam energy of 1.3435 MeV/u (copy from GSI olog)

10:24

Run33 stopped. Run 34 started. Changing beam energy to be on resonance.

Detectors moved fully out. Target moved out

Final spectrum browser stat for all FEEs before run ended (attachment 22)

NEG pump electrical connections tested - all connections sound. 

Detector carriers have been redrilled and are currently being cleaned. Carriers were checked within the chamber, mounting much easier with new hole. Distances to NEG feedthroughs and thermocouple feedthrough from the carrier also checked. NEG feedthroughs have sufficient separation now moved, thermocouple required moving to top flange position to avoid collision with carrier. 

Longer external thermocouples required for top position to reach TC08's. 3 Longer thermocouples made up using spare wire and connected to feedthrough. All thermocouples checked using baking code - all appear fine. We have 2 long thermocouples for the interaction chamber, 2 for the RE-72's and one for the top of the chamber left. Bellows can be reached by shorter thermocouple. This should be sufficient for baking. 

Standoffs job submitted to workshop for production, may be available end of the week depending on schedules of workshop. Clamp guide and hook tools produced.

Cable connectors have started to be seperated and bound into 16 and 17 cable bunches to enable a good fit in strain reliefs. Upon inspection D-connectors were attached upside down and required flipping to correct position (see image - thumbs up indicates correct position). Cables fit through funnel strain reliefs well, other strain reliefs look more difficult - may require more hands to complete. One long connector has criss crossed wires which may not fit in strain reliefs and may require re-wiring a few cables and one long has broken D-connector. Broken ceramic can be replaced with new D-connector and other long connectors are available

Damaged detector removed from carrier and is in its box - awaiting delivery of other detectors. 

Interaction chamber mounted on its frame in CRYRING as well

Kapton cabling and the broken ceramic detector holder have been separated. Required holding jacking plate in a vice and using lots of propanol to wet the jacking screw. A long set of kapton cabling has been removed from the other side of the chamber which can be used when mounting the detectors. The feedthrough flange was re-mounted on that side with no kapton cabling. 

The wiring for the NEG feedthroughs was in confilct with detectors in previous position. Feedthroughs have been moved to the DN40 flanges at the top and bottom of the chamber section. In order to wire the NEGs to the feedthroughs required rotating the NEGs one position anti-clockwise and re-wiring some of the connections. 

Left two Getters are connected in series and are connected to the top feedthrough. The two right and the bottom getter are connected in series and are connected to the bottom feedthrough

29/9/21

We have opened the cleaned parts for assembley of the moving detector frames. We appear to have everything we require. 

Standoffs - 12 M3x35 bolts, Many M3 washers, Many M3 nuts, 16 standoff tubes. 

Heatshield - 46 M2 nuts, 46 M2x20 bolts, 16 M2 washers

Strain reliefs - 20 M4x35 bolts, Many M4 washers. 

Strain relief supports - 30 M4x10 hex head bolts, Many M4 washers

Clamp - 2 M6x10 bolts 

Upon attempting to assemble standoffs M3 bolts became stuck and could not be removed. A similar issue occurred with the MACOR assembley a few weeks ago. The detector frames have been given to Omer along with a diagram of the correct hole sizes to check and re-drill holes if neccessary. Frames will then be cleaned. We expect to get them back tomorrow to continue assembley. 

30/9/21

Bolt hole sizes were checked and appear to be correct, no re-drilling required. Detector frames cleaned after stuck bolts were removed. Holes were checked again using M3 and M4 bolts, none became stuck. The heatshields, strain supports and clamp were assembled on the frames. Remaining pieces and bolts are accounted for and can be assembled when required.  

Laser surveying team worked till 11. Chamber was too high by 3mm close to the jet target and 6mm by the turbo pump (towards the dipole). 

CARME lowered appropriate amount using bolts under CARME feet. Height checked using a laser on the centre point line of the middle flange turbo end and mid point on the front of the chamber (see images). During lowering front foot swapped and valve supports moved slightly to give more clearance for opening. ~13cm clearance for opening the chamber currently. 

Pipe and single bellow connecting CARME to dipole replaced by two bellows and new pipe. Rest of open ports on chamber closed. 

Thermocouple feedthrough flange installed under the motors flange in the turbo pump section. One internal thermocouple hooked onto kapton cable connected to MACOR and one thermocouple left floating in the chamber. Floating thermocouple corresponds to right output on feedthrough, thermocouple on kapton corresponds to left output on feedthrough. Image taken from flanges at the top of the chamber, quality is poor due to lack of maneouvering space.  

Baking frame partially assembled around the chamber. Full assembly requires removing valve airlines to get under the valve pipe, will be done Monday morning. Took measurements for the RGA around the chamber, should be able to fit in multiple positions without conflict with baking jacket. 

Ion pump, RGA and additional gauge installed on the chamber.

Our gauge is the one mounted above the NEG feedthrough, Michael's gauge is mounted below the feedthrough. Ion pump too large to install on the top of the vessel, sufficient room on flange immediately next to this top flange.  

Baking frame assembled around chamber, all required components fit within the baking volume. Insulation on baking tray and heaters set up and connected to pi controller. 

Pumpdown begun at 16:30. Turbopump on at 16:40. Unable to reach the required pressure for the hot cathod gauge before leaving the lab ~18:10. Suggests possible leak, pressure and leak check tomorrow morning.

MACOR strain relief and plastic strain relief tested in edinburgh compared (see image). MACRO hole size is 2x bigger than the test piece, suggests mix up between radius and diameter for MACOR strain reliefs. 

On 21/9/21 CARME was connected to the leak tester. Leak testing showed no apparent leaks, extra time required to reach <1e-4 mbar during initial turbo pumpdown might be due to outgassing from additional installed components on the chamber. Turbo pump restarted 

21/9/21 16:28    9.73e-7 mbar

21/9/21 16:48     8.92e-7 mbar

21/9/21  17:28    7.88e-7 mbar

elog 74 contains the pressure taken every hour after this point from the webcam. 

NEG and NEG-ion cables for controller modules connected to feedthroughs on the CARME chamber. Feedthroughs have been electrically checked and are OK.

CARME baking jacket constructed around chamber. Thermocouples in place around the chamber. Vacuum group are coming tomorrow morning to inspect and de-gas installed gauge, after they are finished we mount final pieces of baking jacket and begin baking.  

CARME setup checked by vaccum group this morning. 

Both IE514 gauges de-gassed. To de-gas on the CM52 controller select the channel and hold the right arrow for two seconds. The reading will flash indicating the de-gassing procedure, this lasts for 2 minutes before completing. Flashing automatically stops once procedure finishes. Attached for convinience is the wire colour-pin assignment for the gauge head again.

Baking jacket fully assembled around CARME and baking code updated. Temperature and rate limits updated to match thermocouples around the chamber.

                        Max Temperature                Max Rate

Chamber                155C                               10C

Floating                  175C                              150C

Octagon (outside tent)  50C                           10C 

 Automatic baking started at 13:50, pressure was 1.69e-7 mbar

Baking halted on 23/9/21 16:16 as connection to TC08 module was lost. USB cable connection to TC08 module appears to have been damaged in shipment. USB hub and cable replaced, connection re-established and baking restarted 17:27. 

Ramping of baking limited to 40C by the maximum difference between parts of the chamber being too high, this safety feature prevents high thermal gradients. Limitation caused by uneven heating due to placement of heating elements resulting in the gate valve end of the chamber being much cooler than the rest of chamber. The pressure increased to ~8e-7mbar at 40C due to increased outgassing. Baking stopped at 07:00 24/9/21, heating elements were repositioned and the baking jacket reassembled. Code recompiled to include the rate and temperatures limits from elog 76.

Baking restarted at 10:00

Additional baking jacket sections for the turbo section arrived today. Baking was halted at ~11:00 to allow for the chamber to cool to install new sections. New sections installed and baking restarted at 15:25. Jacket fits much better with gaps near the turbos and the motors now covered much better. Attached are some photos. 

While heaters were off, the pressure fell to ~3E-9 mbar and was continuing to fall before baking was restarted. 

Current baking temperature is ~75C and code is in automatic mode.

The NEG and motor controllers have been installed on the rack next to the chamber. See attached.  The bottom NEG controller is connected to the 4 D-2000 NEG-ion pumps. The cables for the D-2000s have kapton tape attached. The middle NEG controller is connected to the NEG pumps whose feedthroughs are on the chamber on the inside of the ring. One of the connections on the middle controller is for the 3 NEGs connected together oppose to the usual 2. This connection is marked by white tape. The top controller is connected to the feedthrough who are on the side of the chamber on the outside of the ring. 

Chamber has been vented back to atmosphere. 

Motor was able to be pulled back to insert bloacking pin once at atmosphere.

Thermocouple feedthrough constructed with 4 thermocuples attached. Internal thermocouples each ~200mm in length with external thermocouples each ~1m in length. All were tested by plugging into TC08 and using baking code. Feedthrough will be installed under the motors flange tomorrow. 

Survey team come tomorrow morning, afterwhich ion pump and RGA will also be installed. 

9:30

Ion pumps de-gassed by switching on and off multiple times. Large pressure increase the first time pumps were flashed, pressure recovers quickly once pumps off. Subsequent flashing of ion pumps showed a significantly smaller pressure increase, unitl little increase was seen. 

see http://web-docs.gsi.de/~lestinsk/vacplot.php

Pressure ~3E-8 mbar

10:00

Top NEG controller activated. This controller controls 6 NEG wafers connected in groups of two. NEG wafers connected in two's have the following settings which were utilised in Daresbury

Ramp Time = 45 minutes

Hold Time  = 60 minutes

Vmax =  100 V

Imax =  5A

Pmax = 400W

(See attachment 4)

Settings for the NEG wafers connected in a group of three (white tape on cable) in the moving detector chamber are the same as above but with Pmax = 600W. (See attachment 3)

Settings for the D2000's (kapton tape on cables) are the same used in Daresbury and are;

Ramp Time = 45 minutes

Hold Time  = 60 minutes

Vmax =  65 V

Imax =  3A

Pmax = 254W

Tmax = 500 C

(See attachment 1 and 2)

11:44 

Activation of first set of NEG's completed. The temperature of internal thermocouples went above 150C during activation so power to NEG elements was reduced during activation to 125W per module. NEG's fully OFF to allow internal temperatures to cool. Modules will be activated alone to try and find way of activating NEG's without high temperatures. 

Current bakeout temperature is 95C

Pressure ~ 8E-9 mbar

13:10

All NEG's off. Bakeout Temperature is 95C, internal temperature are ~102C.

Pressure  = 5.8E-10 mbar

Activating a single D2000 NEG pump as they contain in built thermocouples to gauge the effect on internal temperatures. 

14:53

Activation complete for single D2000 up to 500C. Most internal thermocouples remained <110C during activation with one going up to 140C. Temperature of internal thermocouples largely unaffected by the NEG activation untill above 400C NEG temperature. D2000 element will be maintained at 250C for activation of other elements. 

Internal temperatures fallen back to ~102C

Pressure <4E-10 mbar

Would recommend activating elements one at a time with a 20-30 minute ramp and limiting power for NEG modules to ~100W per module. 

The analog readout of the Combivac controller for the IE514 ion gauge has been set up, readings are plotted to http://web-docs.gsi.de/~lestinsk/vacplot.php. Readings and plot should be updated every minute.

01:17

Run 40 continues.

Beam intensity looks OK. Oscillates between just below 2.5e7 and just below 3e7. (attachment 1)

Target density 4.3e11, YR09 pressure 1.54e-10 mbar.

Rates in monitoring code show beam on target.

FEE temperatures all OK - plot over time (attachment 2)

System check OK

Leakage current OK -trending down (attachment 3)

Tape server and merger OK. Merger stats (attachment 4)

ADC data items looks OK, spectrum browser rates OK

Spectrum browser stat (attachment 7 LOG scale) - looks like some HEC were firing previously. Spec browser histograms zero'd to monitor

pn + nn waveforms (attachments 5+6)

Monitoring code energy histograms (attachment 8)

02:40

X2go screen size has decreased further -> cannot see target density but can view beam intensity. Will use ML vac plot to help gauge beam on target

Beam intensity has decreased over the last hour but has now stabilised and is now ~2e7 at injection. Pressure in YR09 has decreased slightly accordingly from ML online but not significantly (still >1e-10 mbar)

Monitoring code rate plots indicate beam on target

All daq checks OK

Will continue to monitor beam intensity

04:14

Ring intensity has increased and appears stable back at 2.5e7.

Target density has slightly decreased to 3e11, ring pressure YR09 stable at 1.5e-10 mbar. I am reluctant to try and move the nozzle while my x2go screen is not 100%.

FEE temps OK

System checks OK

Merger and tape server OK

Rates in all FEEs look OK

Spectrum browser stats (attchment 9) no HEC firing

Monitoring code rates look OK -> beam on target (attachment 10)

05:14

Beam intensity looks OK, Target density 3.11e11. Ring pressure YR09 2e-10 mbar.

All checks OK

Monitoring code rate looks OK -> beam on target

06:20

Beam intensity OK, Target density 3.1e11. Pressure YR09 1.9e-10 mbar.

FEE temps OK

System checks OK

Statistics and rates of all FEEs OK

Merger and Tape server OK

Monitoring code rates look OK -> beam on target

Merger statistics (attachment 11)

7:15

Beam intensity 2E7, target density getting bad 2eE11. WIll fix it from the lab.

FEE temps OK

System checks OK

Merger OK

Stats OK

Week ending friday 14/08/20

CARME chamber securely mounted upon aluminium frame and support skis. Neg-ion pumps and right angled flanges installed. Neg pumps installed in the wall detector section of the chamber. Neg pumps continuity checked and are electically isolated from the chamber. 

Internal neg installs completed and electrically checked. 

Initial bakeout started which will run until friday, temperature had reached 44 degrees when I left the lab. 

The bottom valve has now been installed on the main chamber

Bakeout test completed. Maximum temperature reached within baking volume was 120 degrees, with baking stopped by the program due to detection of negative temperature gradients. Negative temperature gradients due to a couple of thermocouples becoming unsecured and moving to cooler part of baking volume. Attached documents show temperatures of thermocouples. The colour of plots are linked (all of chamber temperatures are blue etc). Temperature gradient across the chamber is low (less than 10 degrees). Heat loss at the front of the chamber is apparent in the air temperature gradient across the baking volume and between the RE72 temperatures. 

Thermocouples have been resecured (extra tape so hopefully won't fall again) and some repositioned. Heating jacket has been remounted at the front to prevent heat losses seen in first test. Quick heating test was performed this morning up to 50 degrees and it appears heat loss at the front of the baking volume is much reduced. 

Weeklong bakeout will begin monday morning. 

4/6 of the neg feedthroughs installed. Continuity between the power pins, ground pin and the chamber has been checked, we observe 5-10 ohms between the power pins similar to previous checks on the heaters. Also attached are the crimps for the ground tag and feedthrough connector pins.  

A pump cart and leak cart have been connected to the chamber via the top turbo at the back of the chamber. An air line has also been connected to the valve to open/close it. The pirani gaige has also been replaced by a blank flange, a gauge on the pump cart can measure the pressure in its range. The turbo fan and controller were set up and pumping was started after lunch. 

While pumping, the hot cathode gauge was connected to its controller and bakeable shell installed. Gauge will be turned on if pressure is sufficiently low tomorrow, currently no gauges are 'active' on the chamber with the only gauges on the pump cart. 

An RGA is attached to the pump cart and can be seen in attached photos. Majority of contribution in RGA is water with significant contributions from gases in air (nitrogen, oxygen etc) as expected during early pumping. RGA is also quite noisy. 

The leak rate observed is below the minimum value the leak cart can detect (<1e-12 mbar*l/s). Helium was sprayed around the chamber and on the wire seals, however no change in the leak rate was observed, so no significant leaks!

The turbo has been left to pump overnight with the pressure 2e-5 mbar at 16:15. Attached is the pressure against time from 15:00 till 16:15, the rate of pumping in this period was 0.68e-5 mbar/hour.