ELOG CARME

AIDA GELINA BRIKEN nToF CRIB ISOLDE CIRCE nTOFCapture DESPEC DTAS EDI_PSA 179Ta CARME StellarModelling DCF K40

CARME

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Entry time:

Wed Jul 9 11:21:14 2025

Author*:

Subject*:

---9 July---

11:00

Turned detectors on - all stable see attachment 1&nbsp;

AIDA started - all okay.&nbsp;See attachment 2&nbsp;for FEE temps. &nbsp;

All FEEs&nbsp;set to LEC (0x0) and slow comparator threshold set to 300keV (0x1e). See attachment 3.&nbsp;

After some issues tape server and merger all set up, NetVar not working??? have tried to reboot things but still getting issues. See attachment 4 for tape service and attachment 5 for merger.&nbsp;

Currently writing to data to G22-205/R98 (R97 empty), doing background run.

13:30

All checks okay apart from white rabbit, see attachment 6.

Attachment 7&nbsp;- stats&nbsp;

18:30 CEST

More issues with anydesk - now refuses to connect with error message desk_rt_ipc

May be as simple as the monitor being turned off. Will have to be checked in person

Connected to atppc025 via x2go and from there checked

- Temperatures are fine (attached)

- Detector bias / leakage current is fine (attached)

- Data rate from file size being written is around 500 kB/s (fine)

- A number of interesting features in the online background spectrum. Likely all non-physical (attached)

- Stats OK (attached)

20:50 CEST

All checks good.

22:28 CEST

All checks good.

Features in the XY plot rensemble beam hitting the detectors. Attached.

Leakage currents and rates are good - unlikely to be major detector damage. Attached.

Only beam in the ring between now and end of D+D was stable uranium.

Killed CARMEsort via terminal (still no access to anydesk).

Restarted CARMEsort. No obvious structures appear after a few minutes. Was there beam in the ring today?

23:09 CEST

All checks good

Features in the XY plot and Ey plots disappeared.

&nbsp;

---10 July---

03:22 CEST

All checks good.

Features gone. Attached.

05:15 CEST

All checks good.

07:34 CEST

All checks good.

10:40 CEST

All checks good.&nbsp;

12:35 CEST

All checks good. Some features in plots again appeared in last 2 hours, attached Ey plot (attachment 15).&nbsp;

14:40 CEST

All checks okay.&nbsp;

16:40 CEST

All checks okay.&nbsp;

18:40 CEST

All checks okay. Attachment 16&nbsp;leakage current stable.&nbsp;

Attachment 17 Ey plot.

19:35 CEST

All checks OK.

Reset the Root spectra again - highly unlikely to have beam overnight without experiments running.

23:39 CEST

All checks OK.

Still seeing peak at 6 MeV like attachment 17, after resetting the Root spectra. Detector damage? Still seems implausible.

Events are focussed as in attachment 12.

Reset again. No obvious peak or pattern after a few minutes running.

&nbsp;

From Claude K

<blockquote>
&quot;CRYRING was running with the Uranium beam from ESR until Tuesday (8 July) night around 22:00. 
 
From Wednesday noon we started to inject D+ from the local source and had the D+ beam stored at various energies from 14:30 until 17:40. During the night from Wednesday (9 July) to Thursday (10 July) there was no beam. 
 
We then continued measurements with stored D+ On Thursday from ca. 11:00 to 21:00. Since then CRYRING is in shutdown.&quot;
</blockquote>

&nbsp;

---11 July---

08:07 CEST

All checks OK.

Peak at 6 MeV did not re-appear overnight. Attached x2.

12:00 CEST

All checks good! All plots look good!

16:00 CEST&nbsp;

All checks okay!&nbsp;

19:20 CEST

All checks OK.

Background peaks almost visible.

22:53 CEST

All checks OK.

&nbsp;

---12 July---

07:25 CEST

All checks OK.

10:00 CEST

All checks OK. Temps attached.

11:00 CEST

All checks OK.

19:00 CEST

All checks OK.

23:00 CEST

All checks OK.

&nbsp;

---13 July---

07:42 CEST

All checks OK.

11:00 CEST

All checks OK.

&nbsp;

ELOG down during the afternoon

&nbsp;

--14 July--

11:00 CEST

All checks ok.&nbsp;

14:40 CEST

Tape service and merger now working on atppc025

All checks ok, briefly went no storage at around 14:38 CEST for 1-2 minutes whilst getting tape service and merger up.&nbsp;

17:40 CEST

All checks ok.&nbsp;

21:30 CEST 
All checks OK.

23:16 CEST

All checks OK. Several screenshots attached.

Calibration appears to hinders clear alpha peaks.

&nbsp;

---15 July---

07:47 CEST

All checks OK.

11:55 CEST

All checks ok.&nbsp;

14:35 CEST

Issue with atppc025, see attachment 29 for error message (desktop 2, detectors etc)

Got error to go, all checks ok.&nbsp;

17:35 CEST

Same issue with atppc025, otherwise all checks ok.&nbsp;

20:30 CEST 
All checks OK.

23:07 CEST

All checks OK

&nbsp;

---16 July---

07:41&nbsp; CEST

All checks OK

12:00 CEST

All check ok.&nbsp;

15:15 CEST

Some fees have high rates, all other checks ok.&nbsp;

15:32 CEST

The above behaviour appears to be correlated with an increase in leakage current across all four detectors. Most likely light?

The background is not reliable -&gt; No storage.

Unfortunately the leakage current logger crashed a few days ago on the server, and without anydesk we did not realise. Restarted it on atppc025.

Informed ML about issue. If it cannot be solved we could increase the thresholds and keep going, but the background may not be representative.

16:35 CEST

Issue persists. ML and ZA are not aware of any changes, except power-saving mode enabled for cave AC. No effect on FEE temperatures - not the issue.

aida04 rates shows 0. Checkloaded. Fine for a few seconds. Back to 0. Data event rate 100,000 may be too high.

Increased thresholds to 1 MeV. Data rates lowered, but e.g. on aida04 still 40,000. Goes back to zero. Checkloaded. OK for a short while, then back to zero.

Tape server stopped. DAQ stopped - all FEEs respond, good! Merger still going.

DSSDs off. Will retry tomorrow morning.

23:44 CEST

Temps OK.

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ELOG V3.1.4-unknown