Plans for MICE at RAL Paul Drumm WG3 Fact03 paul drumm, mutac jan - - PowerPoint PPT Presentation

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Plans for MICE at RAL Paul Drumm WG3 Fact03 paul drumm, mutac jan - - PowerPoint PPT Presentation

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Plans for MICE at RAL Paul Drumm WG3 Fact03 paul drumm, mutac jan 2003 1 MICE MICE Status - Yagmur Toruns Talk Scientific approval given Collaboration (incl. host lab) seeking funds Demands on Host Laboratory: Muon

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paul drumm, mutac jan 2003 1

Plans for MICE at RAL

Paul Drumm

WG3 νFact03

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paul drumm, mutac jan 2003 2

MICE

  • MICE Status - Yagmur Torun’s Talk

– Scientific approval given – Collaboration (incl. host lab) seeking funds

  • Demands on Host Laboratory:

– Muon Beam – Experiment Area

  • existing test beam facility

– Infrastructure….substantial

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paul drumm, mutac jan 2003 3

RAL & ISIS ISIS

Harwell RAL

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~600 keV C-W H-Injector 70 MeV DTL Linac

ISIS Linac

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paul drumm, mutac jan 2003 5

50 Hz Rapid Cycling Synchrotron Charge-Exchange (foil) injection Fill ~10 ms Accelerate ~10 ms 200 µA, 800 MeV Beam (160 kW) 1.5 MHz, dual harmonic

  • two bunches

~ 1.5×1013 protons total

ISIS Ring

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paul drumm, mutac jan 2003 6

Existing Facility

  • Insertion (dipping) Target in synchrotron
  • Beam line Based on ex NIMROD magnets

(1950s) – multi – GeV beams (!)

  • Beam (p/π) Used for Detector Testing
  • Low rate
  • Low use
  • Upgrade for MICE
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paul drumm, mutac jan 2003 7

Existing Target

Replacement Target System Needed

  • Reliability
  • Reproducibility

Internal Target catches edge of beam

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paul drumm, mutac jan 2003 8

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paul drumm, mutac jan 2003 9

Mice Hall

Hall:

L = 47 m W = 12 m H = 8 m S = 564 m2 V = 4512 m3 Two overhead cranes (8 tonnes each)

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paul drumm, mutac jan 2003 10

Mice Hall ..

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paul drumm, mutac jan 2003 11

New Beam Line

  • Reuse existing beam elements
  • PSI SC magnet from µE4 beam line

(5m, 5T)

– Production Target & Capture - quads – π momentum selection (dipole) – Decay (Solenoid) – µ momentum selection / π rejection (dipole)

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paul drumm, mutac jan 2003 12

Beam Purity

(quad doublet Example)

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paul drumm, mutac jan 2003 13

Beam Line

  • Pµ < 400 MeV/c
  • Rejection of protons and

pions <10%

  • few muons per µs
  • Two solutions possible:

– PSI solenoid

– cryogenics available – release by PSI

– quadrupoles

  • Preferred solution - Solenoid
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Front End Options

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MICE Experiment

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MICE Layout… & Infrastructure

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RF System

Cooling Channel Envelope Absorber Tuning Bellows RF Cavity Cavities Raft Solenoid Magnet

8 ×201 MHz Cavities 1 MW per cavity Low Duty Factor 1-2 ms 1-10 Hz average power ~1kW/Hz

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paul drumm, mutac jan 2003 18

~

RF Drive - One Chain drives 1 Cavity

TH116 TH571or ex SPS AMP Solid State Driver

LEVEL & PHASE CONTROL SOURCE OTHER DRIVE CHAINS

10mW 2 kW 60 kW 1.2MW 40 kV 20 kV

R.A. Church RAL

  • proposed scheme

70db COUPLER

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paul drumm, mutac jan 2003 19

RF System

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paul drumm, mutac jan 2003 20

RAL RF Tube Tests

IA ~110 A Field

  • Stock of ~ 12 retired

tubes

  • trial tube operated

comfortably at 1.25 MW (~300 µs pulse at 50/32 Hz)

  • (peaks at ~1.6 MW)

260 µs

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paul drumm, mutac jan 2003 21

Liquid Hydrogen Absorber

  • Liquid Hydrogen – Major safety issue

– ISIS Liquid Hydrogen Moderator

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paul drumm, mutac jan 2003 22

“

  • beam

Detector 1 Absorber 1 Detector 2 Absorber 2 Absorber 3 RF 1 RF 2 Vacuum LH2 He Detector gas “

  • beam

Detector 1 Absorber 1 Detector 2 Absorber 2 Absorber 3 RF 1 RF 2 “

  • beam

Detector 1 Absorber 1 Detector 2 Absorber 2 Absorber 3 RF 1 RF 2

Absorber ..

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Absorber Evolution …

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Absorber Integration .

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Absorber Integration ..

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Safety Loop

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paul drumm, mutac jan 2003 27

Magnets & Cryogenics

Principle Issues – Fringe Fields – Cryogenic Requirements - 380W @4K = 500W Unit Blue contours: 10 mT Orange: 0.5 mT

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paul drumm, mutac jan 2003 28

Other Magnetic Configurations

Fields in same direction

  • Still needs to be evaluated
  • affect on the linac
  • impact on machine instrumentation & operation
  • impact on working environment
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paul drumm, mutac jan 2003 29

Detectors

Spectrometer: Technology Choices: Issues: SiFi - Large cyro cooling needed for VLPCs TPG – HV & flamable gas (next to Lig.H cell)

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paul drumm, mutac jan 2003 30

Basic Infrastructure

Plant: Electrical Power ~ 400 kW Cooling Power ~ 500 kW plant Cryogenic System ~ 500 W system small system for µ Sol Hydrogen Delivery - condensation cooling & Handling

  • ventilation system & safety

Control Room

  • local rack space

Installation phased build of the experiment

  • support & alignment system
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paul drumm, mutac jan 2003 31

  • Location
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paul drumm, mutac jan 2003 32

Cryogenics

  • Muon Solenoid
  • MICE Solenoids
  • SciFi detectors
  • Cryogenic Absorbers
  • est. ~500W of cooling @4K (incl. margin)
  • complicated system

– design work in progress

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paul drumm, mutac jan 2003 33

ISIS Perspective

Critical Issues: Beam Line Long Shutdown Break into ISIS Synchrotron from MICE Hall Have Shielding available

  • Next Spring (2004)

Competes with other ISIS projects

  • 300 µA upgrade*
  • Second Target Station*
  • RFQ Installation
  • delivery of contracted neutron amp.hours

* work in synch. vault

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paul drumm, mutac jan 2003 34

Expected Progress

  • Proposal submitted start 2003
  • Positive reviews from
  • international review panel
  • UK funding agency panel
  • MICE is part of the UK’s Science road map
  • funds not yet allocated to MICE-UK
  • budget funding originally foreseen 2004…
  • negotiations taking place for 2003
  • Collaborators requesting funds
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paul drumm, mutac jan 2003 35

Programme….

  • Now till …

– clear hall in preparation for

  • 2004 Shutdown

– Start breaking into concrete

  • Proceed to install infrastructure

– Electrical Power, cryogenics, cooling power – Beam Line Solenoid installation & tests

  • Beam line completed in 2005/6 Shutdown
  • MICE Installation follows

– Expect mice staged operation in 2006….

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paul drumm, mutac jan 2003 36

Technical Issues

  • RF Drivers
  • need clarification - cost issue
  • Absorber & Coils Group
  • design & safety case developing
  • Absorber Safety Review
  • Coil Field Configurations
  • need evaluation/shielding
  • Integration …..