 Wed Sep 18 09:24:48 2024, CLW, run219173 
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Strips 1-16 dE.
Strip 8 is not working. Strip 16 is drowing the 10B peak in noise. All others look ok. The low energy peak around channel 300 in
visible in some strips may be the Li recoil. The main peak around channel 800 is 10B(n,alpha_1) at around 1.3 MeV. The alpha_0 channel should be at around |
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Wed Jul 31 11:15:09 2024, CLW, Francisco, reference samples, 10B, LiF, blank
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B10 and LiF samples have arrived at CERN.
There are 4 LiF sample, 4 Boron sample and one blank sample. All samples are attached to a square and are in good condition. |
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Tue Oct 22 14:05:02 2024, Francisco GarcÃa Infantes, Transport of the 40K sample to CNA
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Thu Jun 20 12:41:22 2024, CLW, To Prepare
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- new Kapton windows for chamber (underway, waiting for workshop)
- LiF and B samples from Daresbury: under production, will be shipped directly to CERN
- shorter flat cable: will try again to make a proper flat cable that is shorter. check with Tom |
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Wed Jan 22 14:41:09 2025, Selin, Strip Comparison for Li and K
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1. LiF 2 strip comparison. This includes 12 runs.
2. LiF 3 strip comparison. This includes 4 runs.
3. K40 strip comparison. This shows 213 runs which have been grouped into 3 equally. |
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Mon Sep 16 09:23:36 2024, Emmanuel, Spectra
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Spectra after adjustments of the MWD and UserInput:
10B - Sample 1, 10B - Sample 2, LiF - Sample 2 and LIF - Sample 3.
We haven't seen the triton peak in any of the LIF - just noise and alpha. |
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Tue Oct 22 08:36:28 2024, Francisco García Infantes, Saturday 19 intervention
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During the intervention on Sunday there were some problems related to the detectors and the Dummy sample.
When we opened the chamber we realised that the detectors were not in place. It happened at the beggining of the experimental campaign while
we were changing one of the references samples. As far as Emmanuel and I remenbered, the detectors were well fixed in the support, and we guess that the |
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Fri Sep 27 15:51:30 2024, CLW, Runplan for last ~week of run: UNDER CONSTRUCTION
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- run with LiF for a few hours with filters in the beam -- > this will help with the neutron energy calibration later
- run again LiF and 10B (not all samples, 2 LiF and 1 B are enough)
- run with the dummy sample |
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Wed Sep 18 10:08:58 2024, CLW, Quick Plotting in terminal directly from root file
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root -l run219167.root
TH1F *h=new TH1F("h","h",5000,0,5000)
EDET->Draw("amp>>h","detn==7") |
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Fri Sep 13 11:34:01 2024, CLW, TD, Pulser
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Screenshots of pulser signal in DEED - 1-4 and EDET 1-4
Pulser settings: |
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Mon Oct 21 17:44:11 2024, Selin, Protons
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| This is the Excel sheet where the proton numbers and the runs are kept track of. |
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Tue Aug 27 09:01:01 2024, CLW, Prep Meeting Slides
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Fri Sep 20 09:19:35 2024, CLW, Photos of Setup
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| Photos |
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Tue Apr 16 08:57:12 2024, CLW, New Elog tab for 40K experiment
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This is a new elog tab dedicated to the 40K(n,p) and (n,alpha) experiment. Things to be prepared before the run (start of run TBD):
- new almunised Kapton windows for chamber (Peter has ordered material) |
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Tue Sep 17 15:09:29 2024, FGI, CLW, LiF sample rotated
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In the scheenshot attached, the LiF sample is the same but the number of signals are different and the amplitude. The LiF is the #2.
Therefore, according to the Emmanuel's plots, we were putting the LiF sample away from the detectors. |
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Thu Sep 19 11:26:44 2024, Selin, Li2 Comparison
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1. The DEED amplitudes of Li2 run when the sample was not rotated.
2. The DEED amplitudes of Li2 run when the sample was rotated. There are two clear peaks which indicate triton and alpha.
3. The EDET amplitudes of Li2 run when the sample was not rotated. |
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Fri Sep 20 09:58:28 2024, CLW, K-40 run219189
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Plot shows deposited energy (very rough calibration) vs Neutron energy (also very rough calibration). We expect the biggest resonances in the 40K(n,alpha)
reaction at ~1 keV and 5 keV. There is an accumulation of counts at those neutron energies and around the expected Alpha energy (~3.5 MeV and ~1.8 MeV).
In the proposal we expected in total ~2000 counts for those resonances for 4.5E18 protons. The plot shows 1/200 of the total statistics, so what |
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Fri Sep 13 08:12:04 2024, CLW, How to Edinburgh Chamber
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| A how to from last year, still relevant for this measurement (only the vacuum valve may have moved depending on the pump. |
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Fri Sep 13 14:38:09 2024, Clw, For next time
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Things to organise for the future:
- plastic detecor mounts to electrically isolate detectors
- storage boxes |
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Sat Sep 14 20:27:27 2024, Emmanuel, Few adjustments and Log book
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Wiith the adjustments:
voltage and leakage current in dE are 7 V and 0.03 µA, respectvely. (W1-20, 3186-9, 20 um)
voltage and leakage current in E are 47 V and 0.04 µA, respectvely. (W1-150 3458-4, 144 um) |