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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: > ==================================================== > Run number : 86 > Date : 11/11/17 > Start time : 02:37:15 > Stop time : 04:48:36 > Trigger rate (MIDAS) : 2 > Blocks written : 87 > 覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧 > 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 > 覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧 > 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 > 覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧 > 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 > 覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧 > 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 > 覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧 > Pressure (IMG1) (mbar) : 8.35 E-06 > Pressure (old gauge) (mbar) : 2.6 E-05 > Pressure (SEC) (mbar) : 4.6 E-06 > 覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧 > Temp (Chiller) deg : -10.0 > Temp (chamber) deg : 5.6 > 覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧 > 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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