ELOG AIDA

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

AIDA

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Entry time:

Tue May 5 16:40:23 2015

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00.00 Degrader changed to 4mm + some of variable (need to confirm)
      Extra 1mm removed.

00.30 R63
      95Br BigRIPS setting -> 94Se
      Degrader ?

FEE64 nnaida1-16 stat spectra (attachment 1)

00.50 Beam tuning for 100Kr started
      Degrader changed to 4mm  fixed + 0.6mm + 0.2mm variable
      => total 4.8mm

09.40 Found detector bias DSSSD #1 tripped
      Detector trips at +20uA at ~ +10V

10.45 R63 stopped

10.45 Bias(V) I_L(uA)    set 50uA trip current
      10      45.105
      20      trips at ~15V
      2       4.450
      4       ~7.4 rising to ~9.4 over ~2 mins
      6       20.4 and rising
 
      Not open circuit. Not Ohmic. Radiation damage?

Time between successive 32000 block data files changes from  ~5-6 mins to ~3-4 mins
      07.57-08.00. SEASTAR Elog records F/C drops in at 08.20. Nishimura-san reports MAKI
      DAQ stopped/stalled c.08.00. Abrupt failure?

11.15 R64
      DSSSD #1 off
      nnaida6, 10, 11 & 16 slow comparator -> 0xff, medium/low energy selection -> 0x1

12.10 R64 stopped
      beam off

12.25 R65

14.09 R65 ends

R66
      New ZDS setting (change in B-rho)
      F11 rate ~4kHz

~15.00 Degrader changed -> 4mm + 1.3mm (variable) Al

16.01 R66 ends

17.00 Checked CAEN N1419 ch #1 with/without bias cable and disconnecetd from DSSSD #1 - zero current
      at bias => problem forward of adaptor PCB

17.28 R68
      100Kr setting

While tuning ZDS, observe few, if any, implants in DSSSD #2 & #3

18.30 Degrader changed to 4mm fixed + 0.4mm variable

19.16 R68 ends
      
      R69
      Degrader -> 4mm + 0.4mm (variable) Al