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

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Entry time:	Tue Feb 21 12:46:24 2017
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Status of today's work to follow... ===F0=== Leak rate of the gas cell was found to be < 1 Torr / 3 hours. Cell was evacuated. With the present setup, probably none of the foils can be rotated in front of the target. Impact will be evaluated later. ===F2=== F2 SSD was checked with alpha-2, and it's dynamic range was set to around ~210 MeV. F2 PPAC was checked with a mask using alpha-1. No anomalies were found. F2 chamber was opened and the sources / mask were removed. ===F3=== Kinematics calculations suggest we should use a total of seven 1.5 mm SSDs (2 at each telescope, plus the additional one for betas at zero degrees) F3 was vented and the masks were removed from PPACs. Covers were installed. Clear Pulse preamps were checked: There are 6 good channels on the existing two A third preamp was marked as non-functional in 2016.10, but we found it is the test channels that do not function. We quickly checked five CNS 1.5 mm SSDs with a 90Sr/90Y source in air. The findings were consistent with the 7Be THM experiment evaluation of detector quality. We noticed on of the PSD feedthroughs is absent inside the chamber. It needs to be installed and checked. ===NaI=== Unfavorable spectral features were removed from many detectors. Detectors are being tested one-by-one, as well as combinations of detectors and cabling, to search for the cause of problems. Encoding: HTML ELCode plain Suppress Email notification Resubmit as new entry

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