AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
CARME
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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>10:56</p> <p>Run 38 started.</p> <p>D+ beam deuterium target. D+ beam energy is 1.5 MeV/u. (beam calc calculation is 1.5160 MeV/u)</p> <p>Beam calc - Attachment 1</p> <p>Target density is about 8.5e12 at/cm2 after moving nozzle this morning.</p> <p>All four detectors positioned fully out and stationary.</p> <p>Left potentiometer = 18.86 mm</p> <p>Right potentiometer = 19.8 mm</p> <p>Ring cycle time is 1 minute. Note we see some hydrogen in in the spectrum, this disapears after a few seconds.</p> <p>Target T1=30K, T2=31.9K.</p> <p>Nozzle position x=-2.89, z=1.72 mm</p> <p>YR09-Etarget pressure = 2.37e-10 mbar.</p> <p>Cooler set value = 846V, 15 mA. Read value = 847.378V, 13.105mA</p> <p>Detector 4 looks OK at the moment.</p> <p>Beam position. Vertical =0.0mm , Horizontal=2.5mm</p> <p>11:05</p> <p>All checks OK</p> <p>Data rate is ~300 kB/sec.</p> <p>Leakage currents - attachments 2,3</p> <p>17:56</p> <p>Rates have dropped significantly. Do not see elastics peak. No beam?</p> <p>18:23</p> <p>Check in with HKR. The thunder and lightning storm appears to have knocked out the beam from 17:30 until 18:10.</p> <p>Beam is now back with an intensity of 2e8 pps.</p> <p>I have also adjusted the nozzle of the gas target slightly and recovered target pressure of 1e13 from 3e11 at/cm2. This has been stable for the last 15 minutes. I think during shifts we will require some nozzle modifications. It is not vital at higher energies but for energies during the week, we will need.</p> <p>We again see the very nice elastic scattering pattern on our detector. I am concerned we may be some shadowing on our detector giving rise to the observed circle? Attachment 5</p> <p>20:30</p> <p>Checks all OK</p> <p>Target density in last 30 mins ~1e13 at/cm2</p> <p>DSSD4 still looking good and stable</p> <p>23:00</p> <p>All checks OK.</p> <p>Detectors all stable</p> <p>Target density still in 1e13 range.</p> <p>We have accumulated lots of stats! This run should provide an excellent run for energy calibration using elastics and reaction peaks.</p> <p>We run overnight and change energy in the morning</p> <p>01:00</p> <p>All checks OK</p> <p>Detectors stable</p> <p>Target density stable 1e13.</p> <p>05:00</p> <p>All good still</p> <p>07:05</p> <p>Run stopped to change energy. Gas target off.</p> <p>final statistics plot attached.</p> <p>Leakage currents overnight also. DSSD4 had two transients during the night but recovered.</p></td> </tr> </tbody> </table> </p><p> </p>
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