Tuda logbooks General E1104 ISACII E1195 E1103 E1147 S1287 S1203 S1233 S1284 S1447 23Na(a,p) S1540 S1381  S1847 Catania

S1233

Fields marked with * are required Entry time: Thu Nov 14 20:50:20 2024 Author*: Type: - please select - Routine Other Category: - please select - General Other Subject: <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;">Naomi Galinski wrote:</td></tr> <tr> <td cellpadding="10px" style="background-color:#FFFFB0;"><p>&nbsp;- Ground test TUDA chamber.</p> <p>- Vacuum test chamber and check cooling of preamps. Temperature sensor for preamps must be attached inside chamber.</p> <p>- Mount beam tuning target holes (5, 3, 1 mm) and target holders (with 10 mm holes)</p> <p>- Calibrate target ladder positions and check horizontal alignment.</p> <p>- Check alignment of detector holders using cross etched plastic.</p> <p>- Attach inside flange to 1x services adaptor PCB (5x BNC, with two pulser -ve and +ve and three bias voltage connectors,&nbsp;to 10-way IDC = 2x5 ribbon cables) to multiple 10-way IDC connectors.&nbsp;For LEDA detectors string 8 sectors together with one cable. Use a separate board for S2 Si detectors.</p> <p>- Attach preamp power supply and pulser signal to outside flange.</p> <p>- Attach preamps to inside flange using 16 ribbon cables.</p> <p>- On the outside these 16 ribbon cables are split into two 8 ribbon cables and go into two RAL shaping amplifiers.</p> <p>- Test preamp signals for each channel with pulser. You can use the signals going into or coming out of amplifiers. Best check both to make sure you know what channels in the amps correspond to which channels in the preamps.</p> <p>- Attach Si detector bias cables from inside flange to preamps using BNC to SNC cables.</p> <p>- Attach Si detector bias cables from outside flange to CAEN SY40S voltage supply using BNC to BNC cables. This voltage supply only outputs -ve voltage.</p> <p>- Check Si detector bias using a VT100 monitor, which is attached to the CAEN voltage supply. Add a small voltage first and make sure the leakage currents are going up but stay low.</p> <p>- Attach Si signal cables to preamps using 16 ribbon cable.</p> <p>- Insert alpha sources and close chamber. Before closing make sure all cables are tied onto the rails and are out of the way of the beam path and not blocking Si detectors. Close slowly making sure no cables are being pulled out of sockets and unmount target ladder if it's in the way of the Si detectors.</p> <p>- Check alpha source signals from amps in atmospheric pressure first. Preamps and Si detectors must be biased, but don't leave preamps on long due to heating concerns.</p> <p>- Pump down following pump down procedure. Once vacuum is less than 1e-5 T you can switch on preamp chiller. Preamps should not be turned on in vacuum without being chilled.</p> <p>- Connect DAQ next. Amplifier ADC outputs go to Silena 9418 ADC modules in VME crate. Amplifier ECL outputs go to CAEN V1190 TDC modules in VME crate.</p> <p>- Check DAQ configuration following procedure written in DAQ configuration.</p> <p>- Connect MVME2431 module in VME master crate to computer.</p> <p>- Start DAQ. First start tape drive and then MIDAS-session following MIDAS startup procedure.</p> <p>- Turn on preamps and Si detector bias and start run and look at alpha signal gains and channel thresholds.</p> <p>- Change amplifier gains by changing two resistors on board and change threshold on front panel. Instruction are in another elog entry.</p> <p>- Take calibration source run.</p> <p>- Turn off bias to preamps and Si detectors.</p> <p>- Open up chamber. First turn off chiller and let it warm up to room temp. Then vent following venting procedure.</p> <p>- Take out alpha source.</p> <p>- Add targets to target ladder but leave one target holder with 10 mm hole free for beam tuning.</p> <p>- Install detector shields for beam tuning.</p> <p>- Attach target ladder current and FC scalars for operators to see beam currents.</p> <p>- Pump down again and let operators tune beam. Move target ladder to different positions as beam tuning proceeds.</p> <p>- Vent chamber BUT before opening get someone to swipe inside of chamber. This is a Triumf safety procedure after beam is passed through a target chamber.</p> <p>- Remove detector shields, pump down and cool preamps.</p> <p>- Start cryo pump after vacuum is good enough.</p> <p>- Turn on bias to preamps and detectors and start taking data!!!!</p></td> </tr> </tbody> </table> </p><p> </p> Encoding: HTML   ELCode   plain   Suppress Email notification Attachment 1:

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