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EPIC Far-Forward Weekly Meeting
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US/Eastern
Description
Wiki: https://wiki.bnl.gov/EPIC/index.php?title=FarForward
Join ZoomGov Meeting
https://bnl.zoomgov.com/j/1602996456?pwd=NHlISDV4bWpDTlZVZjFWNzdkMEtBZz09
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Meeting topics:
- Cooling and mechanical integration issues for the Roman pots
- Follow-up discussion on ZDC reconstruction
- Cooling and mechanical integration issues for the Roman pots
- Follow-up discussion on ZDC reconstruction
Attendees
Sebouh Paul, Raphael Dupre, Alex Jentsch, Carlos Ayerbe, Chang Jun, Christine Le Galliard, Yulia Furletova, Franck Legrand, Grigory Nigmatkulov, Michael Murray, Carlos Munoz
Roman pots cooling (Raphael Dupre - IJCLab)
- nothing new on the cooling front since last meeting --> need more information on the layout of the sensor packages.
- Working on a test bench setup now.
- Ordered a Peltier and controllers, but work is progressing on getting this setup.
- Still open questions on Peltier stability, radiation hardness, etc. --> lots of questions to address with a test bench.
Roman pots mechanical integration (Franck Legrand - IJCLab)
- Goal is to find a layout for the sensor packages that allows for better coverage around the beam.
- Primary layout similar to previous approach from the JLAB + BNL design, but by using "the parallelogram" mechanism (same as for windshield wipers).
- various modules connected to rods arranged horizontally, and split down the middle vertically - motion from the top middle moves all sensors packages to their various positions around the beam, where the "far" staves stay stationary - only the staves near the beam are "fine" adjusted to hug the beam closely.
- Question from Michael Murray & Alex Jentsch
- How do we account for various arrangements outside of the 2 considered?
- Answer --> this is a single motor, so we are limited in how much control we will have - essentially a fixed ratio.
- Shape adjustment motor is either in vacuum, or a rod outside coming into the vacuum (would need space on the scattering chamber in addition to the main driver for primary coarse motion).
- Question from Yulia
- How are modules attached to this concept?
- Answer --> attached to the cooling plate, which would have to be adapted to this concept and new cooling calculation performed.
- Question from Elke
- Why is this more complicated design needed?
- Answer --> this shape can provide better acceptance around the beam; allows everything to stay in a single vacuum chamber for each station.
- From Alex
- Why not perform a simulation to see how much this change could affect the acceptance?
- Having the ability to adjust the shape remotely will help with not needing full access to the detector.
ZDC reconstruction update (Sebouh Paul)
- The geometry for the SiPm-on-tile for preTDR and what is in DD4HEP are inconsistent - needs a follow-up meeting.
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