AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
CIRCE
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Entry time:
Fri Mar 28 20:48:45 2025
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<p> <table width="98%" align="center" cellspacing="1" style="border:1px solid #486090;"> <tbody> <tr> <td cellpadding="3px" style="background-color:#486090; font-weidht:bold; color:white;">Quote:</td></tr> <tr> <td cellpadding="10px" style="background-color:#FFFFB0;"><p>On 24/11/2018:</p> <p>At 8:35 the chamber pressures read (mBar):</p> <ul> <li>TPU1 = 2.2</li> <li>TPU2 = 2.2</li> <li>TPD1 = 2.2</li> <li>TPD2 = 2.0</li> <li>CHUP = Sensor Off</li> <li>CHDW = No Sensor</li> </ul> <p>The chamber was vented and the CH2 XV target replaced with new ones.</p> <p>See picture 1 for target ladder after dismounting - the beam spot from 7Li is clearly visible on CH2 XV.</p> <p>The target ladder configuration is now:</p> <table border="1" cellpadding="1" cellspacing="1" style="width:500px"> <tbody> <tr> <td>Target #</td> <td>Target</td> </tr> <tr> <td>1</td> <td>Blank 3mm Aperture</td> </tr> <tr> <td>2</td> <td>Blank 10mm Aperture</td> </tr> <tr> <td>3</td> <td>CH2 XVI (840 +/- 40 ug/cm^2)</td> </tr> <tr> <td>4</td> <td>CH2 XVIII (820 +/- 40 ug/cm^2)</td> </tr> <tr> <td>5</td> <td>natC III (590 ug/cm^2)</td> </tr> <tr> <td>6</td> <td>CH2 XX (880 +/- 40 ug/cm^2)</td> </tr> <tr> <td>7</td> <td>CH2 XIX (890 +/- 40 ug/cm^2)</td> </tr> </tbody> </table> <p>See picture 2 for the new configuration.</p> <p>The target ladder was remounted and at 9:15 the chamber pumped down. The far S2 still has the 12um mylar protective foil.</p> <p>By 9:30 the pressures read (mBar):</p> <ul> <li>TPU1 = 4.6e-5</li> <li>TPU2 = 7.4e-6</li> <li>TPD1 = 6.8e-6</li> <li>TPD2 = 8.7e-6</li> <li>CHUP = Sensor Off</li> <li>CHDW = No Sensor</li> </ul> <p>The Far S2 was biased to -130V, leak I = 1.38 uA. The diode biased to -70V, leak I = 0.00uA</p> <p>A beam of 7Li 2+ 4.0MeV was focused onto the target position.</p> <p>After focussing, FC4 = 260 pA, FCA = 250 pA. Both of these faraday cups are before the target chamber.</p> <p>After focussing with the 10mm aperture, FCC = 195 pA. Focussing with the 3mm aperture, FCC = 190 pA. Faraday cup C (FCC) is after the target chamber.</p> <p>A spectrum was collected for 7Li 4.0MeV</p> <p>Run # 181124101041</p> <ul> <li>Run time: 717s</li> <li>Pulser ON, 25 Hz, as before</li> <li>Target: CH2 XVI</li> <li>Beam: 4.0 MeV 7Li 2+</li> <li>Trigger rate: 3285/s</li> <li>DT ~ 6%</li> </ul></td> </tr> </tbody> </table> </p><p> </p>
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