# Presentation: 140158

## LCD Muon/PID MeetingFriday Oct 29, 2004

- 1.    SUBSCRIBE _[FERMILAB_LC_RD@LISTSERV.FNAL.GOV](mailto:FERMILAB_LC_RD@LISTSERV.FNAL.GOV)_ FIRSTNAME LASTNAME        There are "underscores" between: Fermilab, LC and RD.
- 2.    Status of our Mark 0 module (1.05m X 0.5m - 27 fibers) G. Fisk & M. Wayne
- 3.    Testing Discussion - All    -    Paul Karchin
- 4.    Mark 1 Module Planning:   Size is ~ 2.5m X 1.25m.   -    Mitch Wayne
- 5.    Status of  APD development at Colorado State - Bob Wilson/Dave Wagner
- The dialup number is:  825274.
- 	where 82 = video switched mode with 384 kps (full screen) and
-                         5274 = LCSG (Linear Collider Study Group)

## First 0.5m X 1.05m Prototype – Assembled at Notre Dame 10/07/04

- 0.5m

## Status of Mark 0 Module

- Assembled by Mike McKenna/Mitch Wayne @ UND
- 27 strips – 27 WLS fibers 1.2 mm – Kuraray Y-11
- WLS fiber glued with BC 600 by Pat Richards – Lab 6
- Cookie pattern 3 X 3 matrix with three fibers in each matrix element

- O
- O  O

- 1

- 10

- 19

-      2
- 11    20

-     9
- 18   27

-     5
- 14   23

## For Testing Mark 0

- Test with existing cookie
- Testing plan and block diagram
- 2” PMT, HV Supply, logic, QVT, etc
- Mask off 8 of 9 matrix elements
- Test with a radioactive source
- Need training first!
- Log book
- DAQ - later

## Testing plan

**Testing Linear Collider Muon Detector Prototype Planes in Lab 6**
- Abstract:  The LC Muon Detector Study Group plans to test prototype planes in Lab 6 beginning in early November 2004.  This document describes the planes and the tests we plan to do.  We review our needs, potential hazards which we estimate are low risk, and how we will insure our safety and that of other occupants of Lab 6.
- Strip Scintillator Planes
- 	The planes we will test are made from extruded plastic (primarily polystyrene) 4.1cm (W) X 1 cm (T) strips that are doped with a fluor.  The planes are made by gluing with acrylic the strips to a 1/16” thick Al sheet.  Each scintillator strip has a green wave-length-shifting plastic fiber 1.2mm in diameter glued into a groove in the extruded strip with BC600 epoxy.  The fiber exits the strip and makes its way to a “cookie” where it, and the other fibers are glued so that after polishing they can be viewed by a photomultiplier tube (PMT) that converts the scintillation light into a tiny electrical pulse, ~20 pC that is the basis for the detection of charged particles.
- 	The electrical pulses from the PMTs are further analyzed to determine the path and energy deposition of the energy lost by the charged particles as they pass through the muon detector planes and other material they encounter.
- 	The first plane to be tested is approximately 1 m (L) X 0.5 m (W) X 2 cm (T).  It consists of 27 strips and it weighs about 40 lbs (this has to be measured).  We have labeled this module “Mark 0”.  We will soon have four additional planes under construction that we plan to test.  They will consist of 66 strips as shown in the attached figure where it can be seen that their dimensions will be approximately 1.27 m (W) X 2.54 m (L) with a weight of approximately 200 lbs (check this).

## Quarter Planes