TUDA was successfully re-installed on SEBT1 by LB, TD, AML and PM.
Alignment checked by pillar mounted telescope downstream of HERACLES
and target ball between SEBT1 bending magnet and diagnostic section.
With minor adjustments of upper stage table the upstream and downstream
targets were within 15 thou L-R/U-D. Upper stage table and feet locked.
14.00 Cryo pumped by TUDA2:BP5 to <100mTorr
TUDA2.RVC5 closed and cryo compressor switched on
See attachment 1 for EPICS log
Note: MiniSys Eye-IMG ion gauge installed (EPICS readout only)
Re-entrant flange assembly installed - currently the 'window' NW25
fitting is open.
Centre target ladder linear translator re-installed. Note the
downstream linear translator needs to be moved to the upstream
position.
18.28 Time from 1 bar to 250mTorr ~12m (turbo ON)
Time from 250mTorr to 5.0E-4Torr ~5m (cryo ON)
Note: Transients in TUDA:PNG5:RDVAC when cryo gate valve opened
Observed pressure decreases to <1E-10Torr (PM tells
me that for this gauge this effectively means 'off'
cf. the usual TUDA ion gauge which reads high when 'off')
Time from 5.0E-4Torr to 5.0E-05Torr ~6m ('good' vacuum)
Total pump down ~24m (empty chamber)
See attachment 2 for EPICS log
07.32 Tuesday 12 April
See attachment 3 for overnight EPICS log
TUDA2:PNG5:RDVAC 7.2E-07Torr |