Straw working group
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Straw working group. Introduction. Status and plans 2011. Module 0 The frame is in 154 Straws (report by Neil and Yuriy ) Parts and tooling ready by the end of February 64-straw prototype: Test beam with new web and cover with TDC. (validation!) Electronics

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Straw working group

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Straw working group

Straw working group

Introduction

Hans Danielsson


Status and plans 2011

Status and plans 2011

  • Module 0

    • The frame is in 154

    • Straws (report by Neil and Yuriy)

    • Parts and tooling ready by the end of February

  • 64-straw prototype:

    Test beam with new web and cover with TDC. (validation!)

  • Electronics

    • Shorter web (received), TDC (FPGA), CARIOCA baseline

  • Interface parts, which means integration

  • NEW: Micromegashave been ordered for tracking 4x (10x10cm2). Independent tracking for cosmics and test beam. (~ April)

    Rate >100kHz/cm2 and s ~ 25 mm.

Hans Danielsson


Major procurement in 2011

Major procurement in 2011

  • Straw material (single supplier)65 kSFr

  • Frames:DR and Market Survey > 300- kSFr

  • Interface parts

    • Workshop on detector Integration Date ?

    • “Module 0” in September

  • Tooling (Installation in the experiment)

  • Gas system

  • Web, mechanical parts, power supplies etc. First validation with module 0, then series production

Hans Danielsson


Milestones in 2011

Milestones in 2011

  • Module 0 start-upFeb. 2011

    • Finish assembly 1/7/2011

  • Straw production start-up in DubnaEnd of Jan

  • Interface part “module 0”1/10/2011

  • Assembly site at Dubna readyJul 2011

  • Decision on FE baseline Jan 2011

    ->Ok, CARIOCA

  • Validate TDC on cover (test beam)June 2011

  • Synchronization run ???Nov. 2011

Hans Danielsson


Spares

Spares

Hans Danielsson


Working principle

Incident charged particle

Gas

cathode

High voltage 1

Conversion gap

E1

e-

Micro-grille

Avalanche

Amplification gap

Anode strip

E2

Anode plane

Working principle

High voltage 2

1 ) Conversion stage:

Ionization of gas by the charged particle which produces electron-ion pairs.Electrons directed by E1 (0.1 to 1 kV / cm) to the micro-grid, and cross the mesh holes.

2 ) Amplification stage:

E2 (≈ 50 kV/cm) >> E1 avalanche, electronsmulitplication.

Shuoxing Wu

08-03-2010


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