FP420 Meeting - 13 September 2007Beniamino Di Girolamo - CERN PH

Telescope, installation and beam area

B. Di GirolamoCERN

FP420 Meeting - 13 September 2007Beniamino Di Girolamo - CERN PH

Telescope

BAT telescope: 4 working moduleso Used until a week ago on H6 beam line by

RD42 test beamo Two modules need some additional tuning

to remove some chip-to-chip edge effects• That can affect slightly the resolution in some

zone over the surface• Tuning is simple, just need to find time to do it

o All hardware has to stay in the beam area• All power supplies and the control and daq pc

– Length of cables cannot exceed certain limits– SCSI-like type of bus: not meant for long distances

o Two options for module positioning on the table• See later

FP420 Meeting - 13 September 2007Beniamino Di Girolamo - CERN PH

Installation

One marble tableo For telescope mounting and DUTs

Second marble tableo In case the first one is not enough

• the beam pipe setup is quite long Issues when using two tables

o Alignment: we can have surveyors and align everything• Shimming to be foreseen

o Due to limitation in allowable cable length, telescope has to stay on one table• Divergence of the beam to be limited by

– Veto counter– Thin counter

• Both counters to be put downstream of the setup (veto could be put upstream)

FP420 Meeting - 13 September 2007Beniamino Di Girolamo - CERN PH

Main marble table

160 x 50 cmHoles pitch = 2.5”1 x-y assembly1 rotation assembly can be mounted

on x-y one2 kind of brackets to hold telescope

modules1 of the above brackets can be used to

hold sci-counters

FP420 Meeting - 13 September 2007Beniamino Di Girolamo - CERN PH

FP420 Meeting - 13 September 2007Beniamino Di Girolamo - CERN PH

FP420 Meeting - 13 September 2007Beniamino Di Girolamo - CERN PH

When to install and run

Installation start: Oct 10th at 8:00 Beam stop: Oct 16th at 8:00 Table with telescope and possible DUTs can stay until:

Friday 26th 14:00o Interest to use also by Muon people

Table and telescope will then be in H6 until Monday November 12th

FP420 Meeting - 13 September 2007Beniamino Di Girolamo - CERN PH

H8 Beam area

FP420 Meeting - 13 September 2007Beniamino Di Girolamo - CERN PH

Beam characteristics

180 GeV/c, positive polarity Secondary beam: under mm beam spot

o Tertiary beams with good rate down to 50 GeVo 20 and 10 GeV possible, rate is low

The H8 line can have beams in the ranges:o 1-9 GeVo 10-20 GeVo 20-180 GeVo Up to 300 GeV

Pions, muons and electronso At high energy relevant proton contaminationo Going lower in energy pions and electrons beams

contaminate each other, especially with positive polarity