AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
CIRCE
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Entry time:
Tue Mar 25 20:23:26 2025
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<p>On 26/11/2018, after 6.0MeV 7Be and 7Li beam measurements:</p> <p>At 11:15:</p> <p>Far S2 bias = -130.0V, leak I = 1.60uA. Diode bias = -70.1V, leak I = 0.00uA.</p> <p>Pressures (mBar):</p> <ul> <li>TPU1 = 8.5e-7</li> <li>TPU2 = 3.1e-7</li> <li>TPD1 = 6.2e-7</li> <li>TPD2 = 6.3e-7</li> <li>CHUP = Sensor Off</li> <li>CHDW = No Sensor</li> </ul> <p>Detectors and preamps switched off. Turbos off. Line valve closed. Manual and T1600 backing valves closed. Ecodry 1 and 2 off.</p> <p>Waited for turbos to spin down.</p> <p>Opened vent valve at Turbo Entrance 3. The automatic FCC valve immediately closed -> interlock tripped downstream of chamber and stopped turbo at FCC.</p> <p>With FCC valve closed (allowing the chamber to continue venting) we restarted turbo at FCC -> spun up to operating 1000 Hz.</p> <p>Once chamber finished venting, the far S2 was removed and its 12um mylar was replaced with 0.9um mylar ready for beam measurements at Elab = 3MeV. See picture 1 for 0.9um mylar mounted in front of far S2.</p> <p>Far S2 remounted with far iris arm. Far S2 preamp remounted.</p> <p>Preamp power on, currents drawn are good. Far S2 biased to -130.0V, leak I = 1.53uA. Diode biased to -70V, leak I = 0.00uA.</p> <p>Noise looked ok. Detector biases off.</p> <p>12:50 Ecodry 1 and 2 on. Started opening manual valve.</p> <p>13:05 manual valve opened fully. T1600 valve opened.</p> <p>13:10 Turbos on, pressures reached ~9e-5 mBar</p> <p>Far S2 bias = -130.0V, leak I = 1.48uA. Diode bias = -70.1V, leak I = 0.00uA.</p> <p>Set new RAL thresholds whilst monitoring rate: (counting from left of RAL rack)</p> <ul> <li>RAL #1 and 2: 20mV</li> <li>RAL #3: 15mV</li> <li>RAL #4 and 5: 10mV</li> <li>RAL #6: 15mV</li> </ul> <p>13:25 Pressures (mBar):</p> <ul> <li>TPU1 = 1.0e-5</li> <li>TPU2 = 2.8e-6</li> <li>TPD1 = 2.5e-6</li> <li>TPD2 = 3.3e-6</li> <li>CHUP = Sensor Off</li> <li>CHDW = No Sensor</li> </ul>
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