ELOG ISOLDE

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

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Entry time:

Sat Nov 11 01:40:48 2017

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Header: 3.99 MeV/u and CH2_30+25. Continue after reheat the primary target (GPS) between 02:20 and 02:30
Ender: 
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Run number			: 86
Date				: 11/11/17
Start time			: 02:37:15
Stop time			: 04:48:36
Trigger rate (MIDAS)	        : 2
Blocks written		        : 87
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Run Scalars (approx rates)
0- Ungated                      : 3
1- Gated                        : 3
2- dE                           : 136k
3- E                            : 103
4- HI                           : 432
5- Pulser                       : 2
6- Clock			: 968
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Beam energy (MeV/u)		: 3.99 MeV/u
Beam intensity (epA)	        : ~1.5 pA (spread is decreased: 0.7 - 2.2pA) (pictures from 3:44 and 4:35)
Target				: CH2_30+25  (Pos#6; 490-520 ug/cm2)
Ladder position	(mm)	        : 67.26
HI Degrader foil (um)		: 10um Al
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del_E voltage (V)		: -40
del_E leakage (uA)		: 0.63
E voltage (V)			: -350
E leakage (uA)		        : 2.12
E_hi voltage (V)		: -14
E_hi leakage (uA)		: 2.40
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PA power (Up, positive)	(A)	: 1.55
PA power (Up, negative) (A)     : -0.55
PA power (Down, positive) (A)	: 0.8
PA power (Down, negative) (A)   : -0.28
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Pressure (IMG1)	(mbar)	        : 8.35 E-06
Pressure (old gauge) (mbar)     : 2.6 E-05
Pressure (SEC)	(mbar)         	: 4.6 E-06
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Temp (Chiller)	deg	        : -10.0
Temp (chamber)	deg	        : 5.6
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Comments: 
02:14 realized target current was done, but not long. Stopped Run 85
02:18 send protons to beam dump and then called PS to stop them
02:20 in Knob open application: current was set to 0, Reset, turned ON and was increased with medium steps of
around 10A.  
02:30 target current readout at 438 A (set to 433 A) again. Proton back on target

04:40 Laser quality is decreasing. Watched the bars (green and blue) a while and observed huge fluctuation. 
      Green bar (right) is very low in general, and blue bar (left) is jumping between full and something less of
one half. I thought that should be more stabil.

04:46 Events in E_a+E_HI-sepctra: 6 event between 67-129MeV (not sure when it last was reset) --> very low event
rate. 
If the beam is running is mainly checked in MIDAS by looking at trigger(0 and 1) and on refresh update of
spectra s3008 (ADC versus channel (s2order) to see new events. n+n-side of detectors still seeing much noise,
which is also obvious in the scalar rates.

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