 Fri Jun 16 10:42:38 2023, Lucia B, Federico F, Powercut during long run on LNL9 - end of shift 
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On 15/06/2023 morning, around 6:32 am, a powercut caused failure in the Compresed Air Pressure system. Faraday cup was closed by the interlock and the
HV was turned off.
We turned off the accelerator, dismounted LNL9 (pictures attached) and mounted Ta1 Edi backing. We left only ACP28 pump on. We also switched |
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Thu Jun 15 10:13:56 2023, Lucia B, 23Na target location
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| Used and new 23Na targets are in a box in LAB7, next to the other targets |
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Wed Jun 14 11:30:42 2023, Lucia B, Carlo B, LNL6-LNL2-LNL9 7x
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On 13/06/2023 afternoon we dismounted LNL6 sputtered target and mounted LNL2 (identical to LNL1, one Cr layer). We performed a scan of E_res=309 keV
and left overnight under beam. In the morning 14/06/2023 we repeated the scan: the plateau has increased by 50% in height, but was much shorter. After
dismounting, we notice witish dots around the beam spot. |
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Tue Jun 13 12:44:05 2023, Lucia B, Carlo B, LNL4 dismounted - LNL6 mounted
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On 12/06/2023 we dismounted LNL4 after approximately 12 C were deposited.
We then mounted LNL6 (sputtered, in-air target). After a scan of 309 keV resonance, we left the target on for an overnight run. In the morning
of 13/06/2023, the plateau was at the same level as the day before. We did another scan and left the target for few more hours under beam. |
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Sun Jun 11 09:18:23 2023, Lucia B, Carlo B, LNL4
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When opening LNL4 target jar, the valve did not sound as if air was entering it: we suspect the target was actually not properly under vacuum.
We mounted LNL4 target. However, we could not start the measurement because of bad vacuum. Cold trap was warm. We did several N2 washings to
get rid of any residual humidity in the beam line. |
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Fri Jun 9 13:47:24 2023, Lucia B, Carlo B, LNL1
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We performed the scan on the LNL1 23Na target (details in the excel sheets in previous entry) for the E_p=309 keV resonance. The target has a sharp well
defined rising edge, but it quickly deteriorates under beam bombardement (already after 0.1 C we can see the plateau height at same energy decrease). The
thickness of the target also appears much larger than what recorded in the target info. |
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Thu Jun 8 10:36:26 2023, Lucia B, Carlo B, Start of the measurements
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We have started the pumping system and reached ~10^-6 mbar vacuum. We have then filled the cold trap reaching ~10^-7 mbar.
We have started the chiller and the measurement on the Ta backing on 7/6/23. We made a quick run on top of the 19F(p,gamma) resonance at e_p=340
keV, and an overnight run on top of the 11B(p,gamma) resonance at E_p=163 keV. |
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Tue Jun 6 11:15:31 2023, Lucia B,David R, Work on DAQ for 23Na target test
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Attached a picture of the germanium baseline in the morning 6/6/23.
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We change the pulser amplitude to have it in the spectrum at what seemed a good position (A=150 mV). |
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Mon Jun 5 15:48:47 2023, Lucia B,David R, Work on DAQ for 23Na target test
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We started the acquisition via CoMPASS with one CeBr (90) and the HPGe. The germanium was already cooled at 80K with a power of 90W.
The CeBr HV was already applied from NHQ 202M bias supply, channel A, HV = +650V.
We applied the HV to the germanium on 5/6/23, from Ortec 660 dual bias supply borrowed from gas target, channel B, |
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Wed Jun 23 08:23:07 2021, CB, R14 analysis 2 9x
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Given very poor fit using line + power law + line, changes were made to the fitting algorithm.
- Starting paramters optimised for new typical wave shape
- Reverted to 3 lines, since signals are faster
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Tue Jun 15 13:15:48 2021, CB, R14 analysis
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Fit: line + power law + line
Free parameters: 2x boundary points between lines
Algorithm: Nelder-Mead, 20 iterations.
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Tue Jun 15 09:52:10 2021, CB, PB, 2021 Runs - Hamamatsu diode
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Using a 1x1 Hamamatsu photodiode (uncoated)
+75V bias supplied via RAL108 and standard photodiode mount. Imon ~0
Note negative bias would be supplied with standard lemo cable + standard mount.
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Fri Jun 11 10:56:45 2021, CB, R13
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Fit: line + power law + line
Free parameters: 2x boundary points between lines
Algorithm: Nelder-Mead, 20 iterations.
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Tue Jun 8 11:04:36 2021, CB, R11 (long background) dead time
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Pulser frequency: 2.165 Hz (462 ms)
Attach 1: Pulser events vs. total events
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Mon Jun 7 17:41:55 2021, CB, Long background analysis 7x
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Fit: line + power law + line
Free parameters: 2x boundary points between lines
Algorithm: Nelder-Mead, 20 iterations.
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Wed Jun 2 10:26:31 2021, CB, 2021/R3_0 Analysis - 2 lines + power law - 20 iterations
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Fit: line + power law + line
Free parameters: 2x boundary points between lines
Algorithm: Nelder-Mead, *20* iterations.
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Tue Jun 1 15:19:40 2021, CB, 2021/R3_0 Analysis - 2 lines + power law 11x
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Fit: line + power law + line
Free parameters: 2x boundary points between lines
Algorithm: Nelder-Mead, 10 iterations. (centroid correct)
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Tue Jun 1 14:59:06 2021, CB, 2021/R3_0 Analysis - 3 lines 7x
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Fit: 3 lines
Free parameters: 2x boundary points between lines
Algorithm: Nelder-Mead, 10 iterations. (Centroid defined incorrectly from entire simplex instead of best two
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Sun May 23 14:02:58 2021, CB, PB, LdF, 2021 Runs - grade B MSL Si
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R1:
Same as previous configuration?
Negative signals.
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Tue Feb 11 14:49:29 2020, CB, PB, IMK, 2020 runs
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Runs acquired in Jan-Feb 2020
Detector bias -50V
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