| ID |
Date |
Author |
Subject |
|
324
|
Mon Feb 28 07:31:25 2022 |
JG, AK | Current status |
08:30
Temperature setpoint = 110 k
Rutherford rates shaky, peak max at ~ 3x10^2
Merger OK
Data rate ~ 1500 kb/sec
Ring avg pressure ~ 2.7E-10 mbar
Temperatures OK
System checks OK - wr fail attached
Leakage current ~ 3.22 uA |
|
323
|
Mon Feb 28 06:12:58 2022 |
JG, AK, US | Current status |
07:20
Temperature setpoint = 110 k
Rutherford rates shaky, peak max at ~ 3x10^2
Merger OK
Data rate ~ 1200 kb/sec
Ring avg pressure ~ 2.5E-10 mbar
Temperatures OK
System checks OK - wr fail attached
Leakage current ~ 3.222 uA |
|
322
|
Mon Feb 28 05:04:47 2022 |
JM, OF | Temperature cycle to 125K |
06:01
Rutherford rate was decreased compared to previous values. Max rate ~ 50 counts for the peak, average ~20 counts.
Temperature increased to 125 K
No large increase in chamber pressure observed.
06:25
Temperature setpoint back to 110 K.
Rutherford rate has increased, however is quite variable. Peak height 3*10^1 to 10^2 range.
06:54
Setpoint = 110 K
Ruthrford rate has stabilised around 7*10^1 to 10^2 peak height.
Merger OK
Data rate ~ 1300 kb/sec
Leakage current ~ 3.22 uA
Temperatures OK
System checks OK |
|
321
|
Mon Feb 28 04:14:26 2022 |
JM, OF | Current status |
05:20
Temperature setpoint = 110 k
Rates are stable however are slightly lower than previous. Min peak height ~40 counts, max ~ 10^2.
Merger OK
Data rate ~ 1200 kb/sec
Ring avg pressure ~ 2.9E-10 mbar
Temperatures OK
System checks OK - wr fail attached
Leakage current ~ 3.222 uA |
|
320
|
Mon Feb 28 03:16:37 2022 |
JM, OF | Current status |
04:24
Temperature setpoint 110 K
Rates appeared stable throughout the hour ~10^2 peak height. Last 5 minutes rutherford peak height appears reduced, cycling from 10^1 to 10^2. If this continues with sustained low density, temperature will be cycled to 125 K and back down.
Merger OK
Data rate = 1300 kb/sec
Ring avg pressure = 3.1E-10 mbar
Temperatures OK
System checks OK - wr fail attached
Leakage current ~ 3.228 uA
04:33
Rutherford rate appears to have increased and stabilised again around 10^2 peak height. |
|
319
|
Mon Feb 28 02:16:00 2022 |
JM, OF | Current status |
03:21
Temperature setpoint 110 K
Rutherford rate stable. Min peak height ~ 10^2 counts, max ~ 3*10^2 counts.
Temperatures OK
System checks OK - wr attached
Merger OK
Data rate ~ 1500 kb/sec
Leakage current ~ 3.228 uA
Ring vacuum stable, Avg = 3.1E-10 mbar
E1 pump current = 2.5 A |
|
318
|
Mon Feb 28 01:16:02 2022 |
JM, OF | Temperature decrease 115K to 110K |
02:15
Density remains stable at 155 K
Temperature setpoint decreased by 1K. Aim to get to 110 K to see if higher stable density can be achieved.
Spike in YR pressures observed as temperature was decreased, still look OK. Will leave to settle for a while. T = 114K.
Rates remain stable at ~ 10^2 peak height level.
02:33
Pressures stabilised
Setpoint to 113 K.
02:40
No pressure spike observed after decrease
Setpoint to 112 K
02:46
No pressure spike observed after decrease
Setpoint to 111 K
Pressure spike observed in YR pressures (smaller than last) - give time to recover.
03:00
Setpoint to 110 K
No pressure spike observed.
Rutherford rate peak height remains stable at ~ 10^2 . Perhaps peak height minimum is consistently higher than before, difficult to say.
Attachment 1 - 115 K
Attachment 2 - spike 1
Attachment 3 - spike 2
All pressure stable now |
|
317
|
Mon Feb 28 00:24:05 2022 |
JM, OF | Current status |
01:23
Temperature setpoint = 115 k
Rutherford rates still appears stable. Max peak ~10^2 counts, min peak ~50 counts per 20 seconds. Greater fluctuations in YR07 plot however do not appear too high, peaks coincide with sustained higher rutherford counts ~10^2 counts most of the time.
Ring Avg pressure 3.1 E-10 mbar
Ring current ~ 6E7
Temperatures OK
System wide checks OK - wr fails is attached
Merger OK
Data rate ~ 1400 kb/sec
Leakage current ~ 3.23 uA |
|
316
|
Sun Feb 27 23:17:33 2022 |
JM, OF | Current status |
00:20
Temperature setpoint 115 K
Rutherford rate appears fairly stable. Fluctuations from a max peak of 10^2 to a minimum of ~40 peak hieght. Fluctuates remain lower than at 95 K.
Temperatures OK
System checks OK - white rabbit attached.
Leakage current ~ 3.236 uA
Data rate ~1177 kb/sec
Merger OK
Ring vacuum levels appear to have stablised from previous large fluctuations. Avg ring pressure decreased to 3.8E-10 mbar from 7.5E-10 mbar at start of the shift. (attachment 9)
00:51
Rutherford rate still stable. Fluctuations have reduced slightly. Min peak height now ~60 counts, max peak ~10^2 counts. (attachment 10)
Ring vacuum avg = 3.2 E-10 mbar.
E1 pump current ~ 2.4 A |
|
315
|
Sun Feb 27 22:03:51 2022 |
JM, OF | Current Status |
23:00
Target Temperature setpoint 95 K
Current in the ring ~ 5e7 pps
Rutherford rate appears to fluctuate by 2 ordera of magnitude depending on target density. Rate currently ~10^2 counts per 20s. (attachmet 1) can vary to nothing (attachment 6). When consistently low will increase temperature
Effect of target density can be observed in beam current plots. (attachment 7). When rutherford rate is high, beam current tends to decrease over the shot. When the rate is low the current maintains a level throughout.
Merger OK
Data rate ~ 800 kb/sec. Current run 78
Leakage current ~3.24 uA
Temperatures OK
System Checks OK - white rabbit fail attached
23:36
Rutherford rate consistently low. Maximum rate was just below 10^2 counts, only lasted for one beam shot then low count rates < 10^1 counts.
Setpoint increase to 125 K.
Increase in pressure across the board in gasjet after increasing temperature which reduces fairly rapidly after 5 minutes. Current in E1 pump reduced from 2.7 A to 2.3 A at 125k.
Rate at 125K attachment 8. Appears stable.
23:49
Setpoint decrease to 115 K,
23:56
Temperature now stable at 115K. Rate has increased to ~10^2 counts per 20 secs and appears stable (no large fluctuations). Will keep at this level to see if it can be maintained for significant time period. |
|
314
|
Sun Feb 27 20:38:06 2022 |
Rui-Jiu Chen, Yuri | Current status |
Ring current ~5.0e7 particles/s
SW3
- Merger OK
- Screenshot uploaded
- Data rate : 1081kbytes/s
SW4
- current plot uploaded. 3.25 uA.
SW2
- T OK
- system wide checks OK
- Check statistics tab ok
- Spectra ok
SW5
4 plots uploaded |
|
313
|
Sun Feb 27 20:19:06 2022 |
Rui-Jiu Chen, Yuri | open the valves of target. |
|
|
312
|
Sun Feb 27 19:01:02 2022 |
Rui-Jiu Chen, Yuri | Current status |
Ring current ~5.96e7 particles/s
SW3
- Merger OK
- Screenshot uploaded
- Data rate : 1062 kbytes/s
SW4
- current plot uploaded. 3.25 uA.
SW2
- T OK
- system wide checks OK
- Check statistics tab ok
- Spectra ok
SW5
4 plots uploaded |
|
311
|
Sun Feb 27 18:46:42 2022 |
Rui-Jiu Chen, Yuri | Change target temperature |
time Temperature E1 current(A) E1 frequency(Hz)
19:06 170 1.2 820
19:11 200 1.53 820
19:37 230 1.56 820
19:37 275 1.35 820
19:48 300 1.2 820
keep this temperature for 15 minues.
20:07 change the temperature from 300 k to 95 k.
21:11 95 2.65 820
|
|
310
|
Sun Feb 27 17:00:45 2022 |
Rui-Jiu Chen, Yuri | current status |
Ring current ~7.76e7 particles/s
SW3
- Merger OK
- Screenshot uploaded
- Data rate : 1664 kbytes/s
SW4
- current plot uploaded. 3.25 uA.
SW2
- T OK
- system wide checks OK
- Check statistics tab ok
- Spectra ok
SW5
4 plots uploaded |
|
309
|
Sun Feb 27 16:30:35 2022 |
Rui-Jiu Chen, Yuri | Change target temperature again |
1. change T from 95 k to 140 k.
2. keep T at 140k for 15 minutes.
3. change T from 140 k to 95 k. |
|
308
|
Sun Feb 27 15:41:33 2022 |
Rui-Jiu Chen, Yuri | current status |
16:38 change target temperature from 95 k to 140 k.
16:48 change target temperature from 140k to 95k.
Ring current ~5.62e7 particles/s
SW3
- Merger OK
- Screenshot uploaded
- Data rate : 1190 kbytes/s
SW4
- current plot uploaded. 3.25 uA.
SW2
- T OK
- system wide checks OK
- Check statistics tab ok
- Spectra ok
SW5
4 plots uploaded |
|
307
|
Sun Feb 27 15:02:16 2022 |
Rui-Jiu Chen, Yuri | Change target temperature |
16:00 change temperature from 95 k to 120k.
16:07 change temperature from 120 k to 95k.
Ring current ~4.97e7 particles/s
SW3
- Merger OK
- Screenshot uploaded
- Data rate : 1036 kbytes/s
SW4
- current plot uploaded. 3.25 uA.
SW2
- T OK
- system wide checks OK
- Check statistics tab ok
- Spectra ok
SW5
4 plots uploaded |
|
306
|
Sun Feb 27 14:05:30 2022 |
Rui-Jiu, Ragan | Current status |
Ring current ~7.61e7 particles/s
SW3
- Merger OK
- Screenshot uploaded
- Data rate : 1312 kbytes/s
SW4
- current plot uploaded. 3.25 uA.
SW2
- T OK
- system wide checks OK
- Check statistics tab ok
- Spectra ok
SW5
4 plots uploaded |
|
305
|
Sun Feb 27 13:34:24 2022 |
RSS TD | Current status |
14:33: 95K-->140K
14:44: 140K --> 95K
Ring current ~6e7 particles/s
Merger, Tape server (WS3): 1414 kB/s writing ok
Leakage current (WS4): 3.43 uA
DAQ (WS2): temperature checked, clock status: ok, adc calibration: ok, white rabbit check: failed
Online monitoring (WS 5): done |