AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
CARME
Draft saved at 00:00:00
Fields marked with
*
are required
Entry time:
Fri Apr 4 17:12:58 2025
Author
*
:
Subject
*
:
> 09.15 Following overnight pumping of CARME chamber by Leybold turbo > Pirani 1.00e-3 mbar IE514 2.83e-7 mbar > > The Leybold IE514 gauge currently in use is the CARME unit ( serial # 1054 ). The calibration data can be found at https://elog.ph.ed.ac.uk/CARME/56 > > > 09.44 Pirani 1.00e-3 mbar IE514 2.71e-7 mbar > > 10.10 Leak tester attached to backing line > > Valves to leak tester and turbo (connection to Edwards scroll pump in between) closed. > > Stop Edwards scroll pump with magnetic valve 'red' button - magnetic valves closes and Edwards scroll pump is switched off. > > Open valves to leak tester and then (slowly) turbo. > > Wait for leak tester to settle in e-12 mbar.l/s range. Leak tester pressure 3.6e-3 mbar. IE514 2.69e-7 mbar. > > 11.00 Pirani 1.00e-3 mbar IE514 2.42e-7 mbar > Leak tester 1.8e-10 mbar.l/s > > 13.04 Pirani 1.00e-3 mbar IE514 2.06e-7 mbar > > Leak testing. > Downstream DN100 flanges from CARME to dipole OK > Lower NEG power connector feedhtrough (downstream chamber) OK > Left hand side (looking downstream) bellows OK > > c. few e-9 mbar.l/s leak bottom left (lookimg downstream) of COF600 wire seal > > Additional torque to M16 bolts bottom left - c. 10 bolts -> 220Nm+ > > c. 0.1-0.3e-11 mbar.l/s > > Further checks around circumference of COF600 seal reveal some small leaks c. e-11-12 mbar.l/s.? However background rate > in leak tester too high for sensitive test - will await recovery to resume checking. > > 14.00 Pirani 9.8e-4 mbar IE514 1.96e-7 mbar > Leak tester 4.9e-10 mbar.l/s > > > 14.35 DSSSD test > IE514 OFF > > Ambient temperature 21.5 deg C > > Top right > -10V -4uA > -20V 10uA > c. -30V > -20uA trip > > Top left > -150V -5.15uA > > Bottom left > -150V -4.97uA > > Bottom right > -150V -6.33uA > > Top right (repeat) > -20V -10uA > -25V -14uA > > 15.28 IE514 ON > Pirani 9.8e-4 mbar IE514 1.87e-7 mbar > > 15.40 c. few e-9 mbar.l/s leak around magnetic valve - probably not an issue in terms of backing performance but may interfere with/confuse leak testing > > 16.05 Pirani 9.8e-4 mbar IE514 1.74e-7 mbar > Leak tester 1.2e-9 mbar.l/s > > Will leave CARME pumping with leak tester on roughing line and see whether leak rate recovers. If so, will continue leak tests tomorrow. > > 18.50 Pirani 1.00e-3 mbar IE514 1.48e-7 mbar > Leak tester < 1e-12 mbar.l/s (leak tester valved off)
Encoding
:
HTML
ELCode
plain
Suppress Email notification
Attachment 1:
Drop attachments here...
Draft saved at 00:00:00
ELOG V3.1.4-unknown