AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
CIRCE
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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 23/02/2018 at 13:49 we started the DAQ in list mode.</p> <p>After starting the DAQ we sent the 3.45MeV 7Li beam onto the CH2 930ug/cm2 target III.</p> <p>The trigger rate ~ 2kHz, event multiplicity = 6.1, dead time ~ 9%.</p> <p>The DAQ save file is: /Remote_Objs/RData_1/180223135345</p> <p>Checking the ADC rate histograms:</p> <ul> <li>ADC 2 Channels 0->7 Rate ~ 1e3 (channels 0 and 5 still disabled)</li> <li>ADC 2 Channel 8 dead</li> <li>ADC 2 Channels 9->31 Rate ~ 1e4 - 1e5</li> <li>ADC 4 Channels 0->15 Rate ~ 1e3</li> <li>ADC 4 Channels 16 -> 29 and 31 Rate ~ 1e4 - 1e5</li> <li>ADC 4 Channel 30 dead</li> <li>ADC 6 Channel 31 Rate ~ 8e5</li> </ul> <p>Picking an S2 backstrip at random we found a proton detection rate ~ 100Hz, no high rate beam scatters were seen, as expected from the thick target. We decided to run for several hours.</p> <p>We performed occasional checks during the run:</p> <table border="1" cellpadding="1" cellspacing="1" style="width:500px"> <tbody> <tr> <td>Runtime (hh:mm:ss)</td> <td>ADC # / Ch #</td> <td>Area in region</td> <td>Ratio to pin diode (ADC 6)</td> </tr> <tr> <td colspan="1" rowspan="3">01:01:00</td> <td>2/20</td> <td>183850</td> <td>61.47</td> </tr> <tr> <td>6/31</td> <td>2991</td> <td> </td> </tr> <tr> <td>4/24</td> <td>262051</td> <td>87.61</td> </tr> <tr> <td colspan="1" rowspan="3">01:30:37</td> <td>2/20</td> <td>269255</td> <td>61.49</td> </tr> <tr> <td>6/31</td> <td>4380</td> <td> </td> </tr> <tr> <td>4/24</td> <td>377251</td> <td>82.94</td> </tr> <tr> <td colspan="1" rowspan="3">02:03:22</td> <td>2/20</td> <td>362581</td> <td>58.07</td> </tr> <tr> <td>6/31</td> <td>5987</td> <td> </td> </tr> <tr> <td>4/24</td> <td>501628</td> <td>77.40</td> </tr> <tr> <td colspan="1" rowspan="3">02:30:34</td> <td>2/20</td> <td>437224</td> <td>57.86</td> </tr> <tr> <td>6/31</td> <td>7277</td> <td> </td> </tr> <tr> <td>4/24</td> <td>600118</td> <td>76.35</td> </tr> <tr> <td colspan="1" rowspan="3">03:19:02</td> <td>2/20</td> <td>561345</td> <td>53.80</td> </tr> <tr> <td>6/31</td> <td>9584</td> <td> </td> </tr> <tr> <td>4/24</td> <td>765584</td> <td> <p>71.72</p> </td> </tr> </tbody> </table> <p>Where the area regions used (in channels) for each ADC Channel are:</p> <p>ADC 2 Ch 20: 0->552</p> <p>ADC 6 Ch 31: 1302->1475</p> <p>ADC 4 Ch 24: 20 ->549</p> <p>The ratios use the number of counts since the previous check. The ratios are decreasing as expected, because this indicates that fewer protons are being detected during the irradiation time.</p> <p>At 17:08 the DAQ was stopped at runtime 03:19:02</p> <p>The DAQ monitor dead time ~ 5%. Event multiplicity ~ 6.0, # Good events = 23917715.</p> <p>We checked the beam current before the chamber, FC-E0 ~ 190pA.</p> <p> </p> <p>See attached "180223_S2FrontStrip_ADC2CH20.png" for sample front S2 strip spectrum</p> <p>See attached "180223_S2BackStrip_ADC4CH24.png" for sample back S2 strip spectrum</p> <p>See attached "180223_PinDiode_ADC6CH31.png" for sample pin diode spectrum</p></td> </tr> </tbody> </table> </p><p> </p>
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