<p><strong>11:05</strong></p>
<p>Confirmed overlap is at 4 mm under new settings.</p>
<p>For unclear reasons, the bottom-left detector is not seeing the halo anymore since around 10:00. Rutherford still visible and if the left arm is moved in the counts at 5 MeV become apparent.</p>
<p>l s by 20 mm, r p in -> 36.5 mm / 64.6 mm</p>
<p>Target thickness 3E11 atoms/cm2. Beam intensity few E7 at injection. Coasting beam mode.</p>
<p> </p>
<p>Data rate x10 compared with earlier. Stats as before - the reason is unclear.</p>
<p>Temps & Merger OK. We should be able to tolerate these rates.</p>
<p>Moved detectors in/out to make sure we were not clipping the beam. A few seconds of data may be present in R41_9</p>
<p> </p>
<p><strong>11:30</strong></p>
<p>Checkloaded. Detector 2 is now counting more.</p>
<p>Moved to run 42. No other changes.</p>
<p> </p>
<p><strong>13:00</strong></p>
<p>Realised cooler voltage was being read via fault g35 divider. Beam stopped</p>
<p> </p>
<p><strong>15:00</strong></p>
<p>Switched to F20. Beam back on. Moved to run 43</p>
<p>Electron cooler voltage = 243.155 V</p>
<p>Collector current = 4.29 mA</p>
<p>Beam energy was slightly off, will try again</p> |