PPS telescope – main idea

• Have 10 layers of PPS in one test-bench• The entire construction is between scintillators (top and bottom)

for external trigger• Every PPS layer is an autonomic detector unit which can be

activated and read with the MicroDAQ system separately• Every layer is inserted to the telescope like two drawers

– Panel Drawer - Placeholder for the panel for accurate alignment, pickoff card, HV connections and gas outlet connections are “built in”.

– MEZZ drawer -inside the hedgehog card and mezzanine card • The very front end (pickoff +mezz card) are inside the drawer • Panel Drawer height is minimal (2cm). Mezz drawer height is

4cm.

ONE detector plate (drawer) in the telescope

PANEL

HV connectorsRO -> Mezz card

Gas connectionGas valve

Drawer b

ack sid

e

Drawer front s

ide

2cm

MEZZ -> CSM

MEZZ CARD

MEZZ <-

4cm

Mezz drawer

The entire construction is made by KANYA PVS connectorsAllowing maximum modularityhttp://www.kanya.ch/global/PVS-pdf/KANYA_PVS_Catalogue_2008.pdf

Parts already in tau and assembly started in the shop

TGC –> PPS testbench

Scintillator based trigger

Precision Chambers

Tested TGC (or PPS) Chamber

Online

• Trigger system: PMTs + NIM logic• Precision readout: gassiplex chips read by VME

ADC + sequencer• PPS read out: signals from each line is

discriminated and the logic OR of all the channels is inserted into the VME TDC

Offline analysis

• Identify muons passing through both precision chambers

• Estimate the coordinates of the Muon in the tested PPS panel

• Look for signal in the panel. Now we look for the entire area, next step is to separate the channels

Testbench Cutflow

PreliminaryAr-CO2 7% @600 torr15 RO channels18 HV @100 MohmHV = 1040V