View source for Phase2 ME meeting minutes 4 14 2021

phase2 ME design meeting minutes 4_14_2021

Danny, Shaun, Gary, Grames, Marcy, Poelker, Reza, Alicia

Gary presented a "vacuum tight" layout, nice

Comments:

# wider girder, based on phase1 experience, although there won't be as many pumps hanging from side
# that said, we want ion pump connected to side of dif pump can, rather than below (less chance of ion pump growing a whisker when mounted to side.  This is a busy region, need to visit tunnel to make sure the side-mounted ion pump won't interfere with anything
# green solenoid downstream of chopper2 cavity:
::*water lines oriented other way?
::*get with Neil and feel confident the old solenoid can be removed (I assume we cut off 2.75" flange, slide solenoid off)
::*Danny points out, we can't have flanges inside bore of green solenoid, imagine a custom nipple with bellows, welded to chopper cavity pipe...
# green solenoids include option to water-cool but we won't need cooling for 200 keV beam
# replace ion pumps on today's model with those used for phase1, 25 L/s pumps with pump out port
# Mount pumps "beam right"
# Decide YAG vs Chromox view screens
# make three more antenna style BPMs
# Bellows after chopper 2, yes it's there (good) but need to get rid of flanges inside the green solenoid
# Visit tunnel, buncher, does it have flanges? getting the connection correct at upstream cross
# flange mounted NEGs on first viewer cross, on harp cross, and on third viewer cross
# buncher, we want an alignment support fixture
# viewer 2, too close for an emittance measurement? Joe will check...
# add an all metal valve upstream of dif. pump can
# FCup1 should come up from below, duplicate the arrangement of PCup from phase1
# need alignment fixture for dipole
# to save space (?) the harp cross could also include a viewer...
# harps resolve spots down to 20um, YAGs resolve down to 100um
#add a BPM on spectrometer line
# wherever there's a haimson steering magnet set, there should be an antenna BPM (straight ahead line)
# order more haimsons

action items:
# Matt get with Neil re: cutting off MFA solenoid
# Gary send out drawing so others can scrutinize
# Gary and Alicia, z-distances for three solenoids, buncher and A3 and A4
# Matt update parts list, extra valve, extra BPM
# order valves, order haimsons, order YAGs screens (all long lead items)
# visit tunnel, conflict for ion pump hanging from side of dif pump can?,  buncher flanges, connections to cross and nipple