AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
BRIKEN
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Entry time:
Mon Mar 31 13:11:08 2025
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> 62Ni on 6 mm C target between MUSICs > > The background before was 0.36 neutrons/s > Now it is around 10 n/s > With 3100 counts/s at F3 we have of the order of 25 neutrons/s > There is an slightly higher than 10 factor between the rate of > the plastic top and bottom (13 cts/s vs 1ct/s). > Rate at F11 (plastic) 900 cts/s. > > We start a proper measurement with DLT > Reset Timestamp > > They will measure with 6mm C target (between MUSICS) for > about 45 minutes and then 15 min without target. > CH2 target at F7 is OUT (beam going directly to F11). > > DLT: 161106_0026_62Ni_F11_C6mm_000 > Run: 000 > > Start: 00:27 > Stop: 01:17 > tlife=3007 s > > At 00:37 > Rate at F3: 3000 cps > Rate at F11: 900 cps > Rate at BRIKEN: 25 n/s > Rate at VPLT:13 cps > Rate at VPLB: 0.8 cps > > Root File: 161106_0117_62Ni_F11_C6mm.root > > > Figure with rates: F11 (black), BRIKEN (red), Clovers (green) > V_PL_T (blue), V_PL_B (pink) > > Figure with F11 spectra: Right (red), Left (blue) > > Figure with time correlation between F11 and BRIKEN > The number of correlations (integrated spectrum minus flat background) > is 73063 very close the number of detected neutrons 73899 > The difference 833 agrees well with the expected number of background > neutrons. That is: for every neutron detected in BRIKEN there was an > ion passing through F11 (!?). > There is a funny double structure in the first 20 microsec. > 94% of the neutrons are detected within 200microsec > > Figure with the spectra of Veto plastics Top (red) and > bottom (blue). There are 7.5 times more counts in T than in B. > One can see in the Top peaks at 3MeV and 12MeV > (corrected from 6 and 25 MeV: wrong calibration!!) > and show signals up to very high energy (GeV) > > Figure with the time correlation between Veto Plastics and BRIKEN > Top (red) Bottom (blue). There is a time correlation with Top veto plastic > for 15% of the neutrons in BRIKEN (11440). There are 18 times less > correlations with the Bottom plastic. > WARNING: The correlation was done for signals above "20MeV" > in the V_PL_T spectra i.e. only including the second bump"
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