Difference between revisions of "GTS meeting 3 14 17"
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| Line 7: | Line 7: | ||
* What we have learned so far: | * What we have learned so far: | ||
| − | # MCRGT01 corrector gets misaligned each time magnets are on: attracted to | + | # MCRGT01 corrector gets misaligned each time magnets are on: attracted to MFGGT02 solenoid next to it. Need to hold it firmly on beamline. |
# With Gun solenoid off, beamlet from the slit on the second viewer is not exactly horizontal - camera may not be aligned? | # With Gun solenoid off, beamlet from the slit on the second viewer is not exactly horizontal - camera may not be aligned? | ||
# The gun solenoid is not centered on the beam. It is significantly off in -45 degree direction (as seen on the viewers). That has to be addressed before we can take good data. | # The gun solenoid is not centered on the beam. It is significantly off in -45 degree direction (as seen on the viewers). That has to be addressed before we can take good data. | ||
# The gun HV being on or biased would not help the QE scans. It appears that the best way to measure the QE is with the anode biased and the puck grounded with the long manipulator. | # The gun HV being on or biased would not help the QE scans. It appears that the best way to measure the QE is with the anode biased and the puck grounded with the long manipulator. | ||
# Do we want to keep the anode biased at +280 V all times (and while running beam)? | # Do we want to keep the anode biased at +280 V all times (and while running beam)? | ||
Revision as of 08:51, 13 March 2017
- DO NOT TURN MAGNET ON WHILE GUN AT HV: with Gun HV off, first bring up the magnet then turn on Gun HV.
- Latest beamline drawings: media:haysg_JL0038343-MAGNETIZED_BEAM_LDRD_ASSY.pdf
- What we have learned so far:
- MCRGT01 corrector gets misaligned each time magnets are on: attracted to MFGGT02 solenoid next to it. Need to hold it firmly on beamline.
- With Gun solenoid off, beamlet from the slit on the second viewer is not exactly horizontal - camera may not be aligned?
- The gun solenoid is not centered on the beam. It is significantly off in -45 degree direction (as seen on the viewers). That has to be addressed before we can take good data.
- The gun HV being on or biased would not help the QE scans. It appears that the best way to measure the QE is with the anode biased and the puck grounded with the long manipulator.
- Do we want to keep the anode biased at +280 V all times (and while running beam)?