AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
EDI_PSA
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Entry time:
Thu Apr 3 19:29:05 2025
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<p>Attached a picture of the germanium baseline in the morning 6/6/23.</p> <p>-----------------------</p> <p>We change the pulser amplitude to have it in the spectrum at what seemed a good position (A=150 mV).</p> <p>We put 133Ba, 60Co and 137Cs sources in the shielding and started run_2 at Mon 6 June 2023, 12:15.</p> <p>The run was stopped at 16:01. (Note there will be two ROOT files in the folder: one (2_1 for DataR_run_xx.root) is the automatic backup at 15:01, when the 'tentative' calibration on CeBr90 was enabled).</p> <p>GeBo FWHM at 1.33 MeV is quite bad: 6.4 keV.</p> <p>-------------------------------</p> <p>We searched again in 16O log for optimal DAQ parameters and found them. We thave hen used them to see any possible resolution improvement. Spectrum is saved as run_3.</p> <p>CeBr90 FWHM at 1.33 MeV is 46.10 keV.</p> <p>GeBo FWHM at 1.33 MeV is 5.37 keV------------>with same parameters, 16O elog reports 3.42058 keV (Feb2023): note that Ge baseline thickness now is approximately 5mV, while in 16O elog I have found 2mV as reference, or slightly more from picture attached to same entry 110 Nov22).</p> <p>Note that lowering the threshold at the 'optimal' values, we are cutting Ge spectrum at roughly 300 keV (which should not be a problem for 23Na+p resonance scan).</p> <p>-----------------------------</p> <p>We have mounted the Tantalum backing from Edinburgh (last spare, cleaned on 20/03/23 at LNGS) on the target holder and closed the beam line. We have left run_4 overnight as background run.</p> <p>------------</p> <p>Ge cryocooler is at 80K and<strong> 92 W.</strong></p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p>
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