ELOG CIRCE

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

CIRCE

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Entry time:	Thu Apr 12 12:47:04 2018
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<p>Date: 06/04/2018</p> <p>We connected the analogue signals of RAL X, XII, XIII, and "R" to the 3rd ADC (Module 4)</p> <p>We connected the analogue signals of RAL "S", "Q", "u", and "w" to the 4th ADC (Module 5)</p> <p>We set the DAQ or to come from the central S2 and the diode monitor. The downstream S2 was not connected to the DAQ</p> <p>At 15:14 we started the DAQ, a message appeared: Performing Automatic Clear. After a few seconds this message disappeared</p> <p>At 15:15 we restarted the DAQ for a 15 minute alpha calibration, 241Am + 239Pu alpha source facing downstream, save name: RData_1/180406142007</p> <p>The dead time = 3%, trigger rate ~ 1100Hz, Even mult = 5.5</p> <p>At 15:31 the DAQ stopped, # good events = 1278692</p> <p>The pressures in the chamber were:</p> <ul> <li>TPU1 = 3.0e-6 mBar</li> <li>TPU2 = 8.2e-7 mBar</li> <li>TPD1 = 1.6e-6 mBar</li> <li>TPD2 = 1.7e-6 mBar</li> <li>CHUP = 1.0e-5 mBar</li> <li>CHDW = 2.8e-5 mBar</li> </ul> <p>The detector bias and leak I were:</p> <ul> <li>Downstream S2 bias = -130.1V, leak I = 2.53 uA</li> <li>Central S2 bias = -129.9V, leak I = 16.53 uA</li> <li>diode bias = -70.1V, leak I = 0.00 uA</li> </ul> <p>Jeremias needed the alpha source, so after this run we vented the chamber. The detectors and preamps were switched off before starting the venting procedure.</p> <p>At 16:15 Raffaele and Jeremias removed the target ladder and dismounted the alpha source from position VII. No other changes were made to the ladder.</p> <p>The ladder was remounted and at 16:19 we started roughing down the chamber. At 16:29 the turbos were started.</p> <p>At 16:40 the pressures read:</p> <ul> <li>TPU1 = 1.8e-5 mBar</li> <li>TPU2 = 3.8e-6 mBar</li> <li>TPD1 = 4.0e-6 mBar</li> <li>TPD2 = 5.6e-6 mBar</li> <li>CHUP = 1.9e-5 mBar</li> <li>CHDW = 5.1e-5 mBar</li> </ul> <p>We were ready to repower the detectors and attempt to run beam on target.</p> <p> </p> Encoding: HTML ELCode plain Suppress Email notification Resubmit as new entry

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