ELOG CARME

CARME

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Entry time:

Wed Oct 28 10:41:57 2020

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10.32

CARME chamber 5.8e-12mbar (see attachment 1)
Backing 1.6e-08mbar (Edwards vacuum cart w/RGA)

CARME temps - see attachment 2

All SAES D2000-10 & UHV1400 NEG power OFF
All SAES D2000-10 ion pump OFF
Gate valve open

11.01

All SAES D2000-10 ion pump ON

#  V/V       presssure/mbar
1  5012/5019  4-8e-11
2  5012      < 8.9e-12
3  5012      < 8.9e-12
4  5012      < 8.9e-12

11.04

CARME chamber 5.7e-12mbar
Backing 1.7e-08mbar (Edwards vacuum cart w/RGA)

12.12

CARME chamber 5.3e-12mbar
Backing 1.7e-08mbar (Edwards vacuum cart w/RGA)

All SAES D2000-10 & UHV1400 NEG power OFF
Gate valve open
All SAES D2000-10 ion pump ON

#  V/V       presssure/mbar
1  5012      < 8.9e-12
2  5012      < 8.9e-12
3  5012      < 8.9e-12
4  5012      < 8.9e-12

All ion pumps now stabilising wrt V/I/pressure

log (pressure) versus time - see attachment 3

16.00

CARME chamber 4.9e-12mbar - see attachment 4
Backing 1.7e-08mbar (Edwards vacuum cart w/RGA)

All SAES D2000-10 & UHV1400 NEG power OFF
Gate valve open
All SAES D2000-10 ion pump ON - see attachment 5

#  V/V       presssure/mbar
1  5012      < 8.9e-12
2  5012      < 8.9e-12
3  5012      < 8.9e-12
4  5012      < 8.9e-12

All ion pumps now stabilising wrt V/I/pressure

CARME temps - see attachment 6

Observing pressure transients from 5e-12mbar to c. 6-7e-12mbar which recover in c. 5-10 minutes

21.00 CARME chamber 4.7e-12mbar

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Attachment 1:

20201028_103204.jpg Original size: 4128x3096

Attachment 2:

20201028_103638.jpg Original size: 4128x3096

Attachment 3:

28102020_pump_down.png Original size: 640x480

Attachment 4:

20201028_161049.jpg Original size: 4128x3096

Attachment 5:

20201028_155823.jpg Original size: 4128x3096

Attachment 6:

20201028_155940.jpg Original size: 4128x3096

Attachment 7:

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