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

Plans for MICE at RAL Paul Drumm WG3 ν Fact03 paul drumm, mutac jan 2003 1

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 paul drumm, mutac jan 2003 2

ISIS RAL RAL & ISIS Harwell paul drumm, mutac jan 2003 3

ISIS Linac ~600 keV C-W H-Injector 70 MeV DTL Linac paul drumm, mutac jan 2003 4

ISIS Ring 50 Hz Rapid Cycling Synchrotron Charge-Exchange (foil) injection Fill ~10 ms Accelerate ~10 ms 200 µ A, 800 MeV Beam (160 kW) 1.5 MHz, dual harmonic - two bunches ~ 1.5×10 13 protons total paul drumm, mutac jan 2003 5

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 paul drumm, mutac jan 2003 6

Existing Target Internal Target catches edge of beam Replacement Target System Needed -Reliability -Reproducibility paul drumm, mutac jan 2003 7

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paul drumm, mutac jan 2003 Mice Hall Hall: L = 47 m W = 12 m H = 8 m S = 564 m 2 V = 4512 m 3 Two overhead cranes (8 tonnes each) 9

Mice Hall .. paul drumm, mutac jan 2003 10

New Beam Line • Reuse existing beam elements • PSI SC magnet from µ E4 beam line (5m, 5T) – Production Target & Capture - quads – π momentum selection (dipole) – Decay (Solenoid) – µ momentum selection / π rejection (dipole) paul drumm, mutac jan 2003 11

Beam Purity (quad doublet Example) paul drumm, mutac jan 2003 12

Beam Line • P µ < 400 MeV/c • Rejection of protons and pions <10% • few muons per µ s • Two solutions possible: – PSI solenoid – cryogenics available – release by PSI – quadrupoles • Preferred solution - Solenoid paul drumm, mutac jan 2003 13

Front End Options paul drumm, mutac jan 2003 14

MICE Experiment paul drumm, mutac jan 2003 15

MICE Layout… & Infrastructure paul drumm, mutac jan 2003 16

RF System 8 ×201 MHz Cavities Solenoid Magnet Cooling Channel Envelope RF Cavity 1 MW per cavity Cavities Low Duty Factor Raft 1-2 ms Absorber Tuning 1-10 Hz Bellows average power ~1kW/Hz paul drumm, mutac jan 2003 17

RF Drive - One Chain drives 1 Cavity TH571or ex Solid State TH116 SPS AMP Driver 70db COUPLER 10mW 1.2MW 60 kW 2 kW 40 kV 20 kV LEVEL & PHASE CONTROL - proposed scheme ~ SOURCE OTHER DRIVE R.A. Church RAL CHAINS paul drumm, mutac jan 2003 18

RF System paul drumm, mutac jan 2003 19

RAL RF Tube Tests • Stock of ~ 12 retired tubes 260 µ s • trial tube operated I A comfortably at 1.25 ~110 A Field MW (~300 µ s pulse at 50/32 Hz) • (peaks at ~1.6 MW) paul drumm, mutac jan 2003 20

Liquid Hydrogen Absorber • Liquid Hydrogen – Major safety issue – ISIS Liquid Hydrogen Moderator paul drumm, mutac jan 2003 21

“ Detector 1 Absorber 1 RF 1 Absorber 2 RF 2 Absorber 3 Detector 2 -beam Absorber .. Vacuum LH 2 He Detector gas “ Absorber 2 Absorber 1 Absorber 3 Detector 1 RF 1 RF 2 Detector 2 -beam “ Detector 2 Detector 1 Absorber 2 RF 2 Absorber 3 Absorber 1 RF 1 -beam paul drumm, mutac jan 2003 22

Absorber Evolution … paul drumm, mutac jan 2003 23

Absorber Integration . paul drumm, mutac jan 2003 24

Absorber Integration .. paul drumm, mutac jan 2003 25

Safety Loop paul drumm, mutac jan 2003 26

Magnets & Cryogenics Principle Issues – Fringe Fields – Cryogenic Requirements - 380W @4K = 500W Unit Blue contours: 10 mT Orange: 0.5 mT paul drumm, mutac jan 2003 27

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 paul drumm, mutac jan 2003 28

Detectors Spectrometer: Technology Choices: Issues: SiFi - Large cyro cooling needed for VLPCs TPG – HV & flamable gas (next to Lig.H cell) paul drumm, mutac jan 2003 29

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 paul drumm, mutac jan 2003 30

Location ������� ������������� ������������� paul drumm, mutac jan 2003 31

Cryogenics • Muon Solenoid • MICE Solenoids • SciFi detectors • Cryogenic Absorbers • est. ~500W of cooling @4K (incl. margin) • complicated system – design work in progress paul drumm, mutac jan 2003 32

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 µ A upgrade* • • Second Target Station* • RFQ Installation • delivery of contracted neutron amp.hours * work in synch. vault paul drumm, mutac jan 2003 33

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 paul drumm, mutac jan 2003 34

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…. paul drumm, mutac jan 2003 35

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 ….. paul drumm, mutac jan 2003 36