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M ICE O perations M anager Report

M ICE O perations M anager Report. Linda Coney University of California, Riverside UKNF Meeting June 8, 2010. Outline. Overview of MICE motivation and beam line layout MICE Schedule Target & Beamline Detector Commissioning p , e, p, and m beams Supporting infrastructure

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M ICE O perations M anager Report

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  1. MICE Operations Manager Report Linda Coney University of California, Riverside UKNF Meeting June 8, 2010

  2. Outline • Overview of MICE motivation and beam line layout • MICE Schedule • Target & Beamline • Detector Commissioning • p, e, p, and m beams • Supporting infrastructure • Beam studies • Upcoming Production Running • Conclusions MOM Report-Coney

  3. MICE Motivation • The muon beam after the front end of a Neutrino Factory is: • Wide – sx ~ 10(+) cm • Divergent – sq ~ 150(+) mr • Need to cool the beam: • Increases number of muons in the acceptance of the accelerator by factor of 2-10 • Ionization cooling is the only good option: • Muon lifetime is short ~2 ms • Cannot use stochastic cooling – slow, iterative process • Muons pass through absorber material followed by RF cavities • Lose transverse and longitudinal momentum in absorber – restore longitudinal with RF g reduction in transverse emittance • Competition between cooling (dE/dx) and heating (multiple scattering) • Optimal results with: • Low Z, large X0 material • Tightly focused beam • H2 most promising absorber material • Simple premise; however, the reality is not simple a need a test MOM Report-Coney

  4. Muon Ionisation Cooling Experiment MICE: Design, build, commission and operate a realistic section of cooling channel Measure its performance in a variety of modes of operation and beam conditions … … i.e. results will be used to optimize the Neutrino Factory design

  5. Layout of MICE: Decay solenoid MICE Local Control Room Linde refrigerator Target Instrumentation in place: Beam profile monitorsTrigger/rate scintillatorsCKOVs, TOF0,1&2, KL Upstream beam line Downstream beam line

  6. MICE Schedule • Current focus is on Step I: • Beamline commissioning • Detector comissioning and calibration MOM Report-Coney

  7. Target Operations • 50,000 pulses of redesigned target in test stand in R78 • Current target installed in ISIS August 2009 • Run at base rate (50 Hz/32) and with ISIS at 50 Hz (Normal User Run) • Inspected regularly – PASSED • Target is working beautifully – NO problems • Target stability checked every 10,000 pulses • Process to monitor target behavior agreed upon with ISIS • Target timing wrt ISIS MS signal monitored • Coordinating Beam Loss measured by MICE with that measured by ISIS • Target Operation: 233,000 pulses to date • February/March User Run – 10 days • April/May User Run – 15 days • See target update during this session MICE target path ISIS cycles MS marker ISIS losses MOM Report-Coney

  8. Upstream Beamline MOM Report-Coney

  9. Beamline • Conventional magnets • Controls software improved • Automatic gradual ramp up/down implemented (DL) • Eases burden on electrical infrastructure & on shift crew • Faulty water flow gauges in all magnet power supplies replaced • Removes cause of most magnet trips during running • Water flow through magnets increased to recommended level • Monitored in Alarm Handler, archived • New pressure valves installed on magnets • Water pressure reduced from 8 to 4 bar • Field monitoring with Hall probe a Configuration Database in the works • Polarity detection scheme implemented • Proton Absorber installed in February downstream of Decay Solenoid -see talk this session – Chris Rogers (RAL) MOM Report-Coney

  10. Beamline: Decay Solenoid • Running well during data-taking September – December 2009 • Linde Fridge serviced in January a developed problems • Cooldown failed end of January • Fridge developed fault – N2 contamination in DS cold box • Blockage in cold trap? • Linde engineer to RAL late March gchanged charcoal in gas panel absorber, cycled through processes, no leaks • But when compressor isolated from cold box and cold trap back into operation N2 levels rose again • Leak in compressor shaft seal? • Easter g Engineer back to RAL mid April g new shaft seal g stuck & would not move • Compressor removed & taken to Linde contractor • Back April 20th with completely new compressor • Stuck seal suspected of being root cause of the problem • Still not solved • Wrong seal from manufacturer – designed for air not He • Ordered new seal – sent wrong one again • Finally got correct seal for compressor • Vacuum gauges also needed to be replace • Scroll pumps needed servicing as well (now done) • Cooldown (re)started mid-May – record time of 5 days • Liquid He level probe not working - Problem with old electronics? • Debugged – replaced suspected chip – end May determined sensor had gone bad • Friday – cold swapped for new sensor – now working • Magnet cold – undergoing current testing MOM Report-Coney

  11. Data Taking Program: Positive Particles • Detector Calibration: • 300 MeV/c pions - used for calibrating the TOF system • 290 MeV/c pions – TOF, KL • 270 MeV/c pions – TOF, KL • 250 MeV/c pions – TOF, KL • 200 MeV/c pions – TOF, KL • 300 MeV/c positrons - CKOV and KL calorimeter • 250 MeV/c positrons - CKOV and KL calorimeter • 200 MeV/c positrons - CKOV and KL calorimeter • 150 MeV/c positrons - CKOV and KL calorimeter • Beam Studies: • Luminosity monitor studies • Particle Rate vs Losses in ISIS Study • Muon beam configurations to study proton absorber(s) • Muon Beams:  • pi+ to mu+ beam (6-200, 3-200, 10-200)- 3500 pulses 17 MOM Report-Coney

  12. 0.48 m 0.48 m 10 x 4cm scintillator bars sx = 1.15 cm st = 50 ps 7 x 6cm scintillator bars sx = 1.73 cm st = 50 ps Tof-0 Tof-1 Detector Commissioning: Time of Flight Counters • TOF0, TOF1 installed for September & Nov/Dec User Runs • TOF2 installed in late November • Horizontal and vertical bars • Have proven to be essential in beamline commissioning MOM Report-Coney

  13. Detector Commissioning: Time of Flight Counters • Time resolution after the calibration: • TOF0 – 51ps; • TOF1 – 62ps; • TOF2 – 52ps. MOM Report-Coney

  14. Detector Commissioning: TOFs • Time of flight distributions for different data sets: MOM Report-Coney

  15. Detector Commissioning: e/m Identifier • KL lead/scintillating fiber calorimeter module • Calibration in progress • 50% of electrons 240 MeV/c at target, and 80% of electrons 360 MeV/c at target release energy in KL tag counter • Muons with 220 MeV/c at target reach EMR • Muons with < 80 MeV/c at KL will die in KL (170 at target) • More data needed: • 170 < mp <200 MeV/c at target • 195 < pp < 230 MeV/c at target Energy Response 27 MOM Report-Coney

  16. Beam Studies • Particle rate vs beam loss – Adam Dobbs - Imperial • Hold target timing steady – vary depth into beam to increase losses • Measure particle rate in MICE beamline • Luminosity Monitors – see talk this session – David Forrest - Glasgow • Determine particle rate close to target & find protons on target as function of depth • Validate particle production in target and beamline simulations • Emittance measurement with TOFs – see talk this session – Mark Rayner - Oxford • Purpose: generate the elements of the “emittance-momentum matrix” Study performance at every portion of a full cooling channel MOM Report-Coney

  17. Infrastructure: Access, DB, & Data Analysis • New ssh bastion is working • Successfully connected through from outside to computers in the MLCR • X-forwarding is working • Two areas of disk space are set up on PPD cluster for MICE • G4MICE will be installed and available on the PPD system • Database • Configuration Database is installed on new database server & web services server at RAL • Database interface is visible from control room • EPICs client now in place to read/write values set in a run • Tested EPICs client with database – successful • NEXT: run in parallel with spreadsheet during Machine Physics runs • Monitoring • environmental conditions, ISIS loss monitors • AC units, magnet PS water flow MOM Report-Coney

  18. Computing Infrastructure SSH Bastion Micenet / MLCR Outside World SSH ssh EPICS EPICS Gateway Config Database DB DB API “Web” services PPD-Grid managed DB API eLog EPICS archiver web interface Spare node SSH / web services Grid Transfer Box MICE managed Grid clients PPD-IT supervised Analysis Node/Farm SSH ssh + analysis code 18 MOM Report-Coney

  19. Data-taking Run: 12 hours MOM & BLOC MOM & BLOC shifter1 shifter2 Next: Finish Step I • Moving into Intense data-taking period to finish Step I before long shutdown • Production Running - User Run in June/July/August: • Run 5 days/week – M-F • 10-12 hours/day (8am-8pm) • Personnel needed: MOM, BeamLine Expert, Shift Leader, Shifter • Shift leader has more experience and trains up new person • Novices need 1 week training shifts before official shifter • Experts/those doing the study are also there to guide & monitor progress MOM Report-Coney

  20. June/July/August Run • Developing Global Run Plan: • User Run JUNE 22-AUGUST 12 • Machine Physics Aug 13-15 • SHUTDOWN August 16 – January 30, 2011 • Machine Physics studies • Activation Study at 4V beam loss • Beam Loss vs Rate • Beam Bump Study • User Run • Week1: Tues June 22-Fri June25 • 3 days TOF calibration • 1 day KL data • Week2: June 28-July 2: Emittance/Momentum matrix with muon beams • Week3 g more emittance/momentum matrix data MOM Report-Coney

  21. Fill in e-p matrix data P (MeV/c) • finding the element (3,240) means to find the BL optics that matches the MICE optics for a beam of 3 mm rad at a P=240 MeV/c 3,140 3,200 3,240 6,140 6,200 6,240 eN (mm rad) • the element (10,200) is the BL optics matching a MICE beam with 10 mm rad at P=200 MeV/c 10,140 10,200 10,240 This pair is our goal: how do we get it? 24/3/2010 CM26 - Riverside CM26 - Riverside 21 21 (*) 700mV ~ 20 mu-/spill

  22. m Conclusions • Beamline is (mostly) working! – negative or positive particles • New target operating smoothly - Systematic monitoring of performance • Decay Solenoid needed for operation – factor 5 increase muon rate • Major increase in loss limits 50 mV (2008) g 1V (2009/10) g 2V? soon • DAQ increase in efficiency: <50 particles/spill (2008) g ≤ 200 part/spill (2009) • Beam loss vs particle rate shows linear dependence • Detectors are working! • TOF0, TOF1, TOF2 calibrated • Need more data for KL but progressing • Tracker works – nearing dual-readout stage • Muon beam physics happening again soon! • Initial measurement of muon beam emittance • More (e,P) matrix data in June/July/Aug MOM Report-Coney

  23. MOM Report-Coney

  24. Extra! Extra! m- m- m- m- m- m- m- m- m- m- m- m- m- m- m- m- m- m- m- m- m- m- m- m- m- m- m- m- m- Muon Beam Studies at MICE! Extra! Extra! • The MICE experiment takes 17000 target pulses of muon beam data! • ~170,000 m at TOF1 • Muon beam e studies begin! Blimey! Muons! Worldwide celebrations ensue! Locals in Britain express strong support for the experiment 35 MOM Report-Coney

  25. Detector Commissioning: Cherenkovs • Two aerogel Cherenkov counters • Installed downstream of Q6 and TOF0 • Used to separate e/m/p 220-350 MeV/c • e/m/p calibration data taken • Sample electron data shown 26 MOM Report-Coney

  26. Run Summary • May 27-28: 10,700 target pulses • Target count is at 233,750 • 300 MeV/c e+ beam TOF calibration – TOF0 trigger • Th/Fri – 6,4000 pulses with ~45 particle triggers/spill • Muon beam: 6-200 point on emittance-momentum matrix – TOF1 trigger • Fri – 1250 pulses ~6 particle triggers/spill • Muon beam: 10-200 point on emittance-momentum matrix – TOF1 trigger • Fri – 1000 pulses ~6 particle triggers/spill • Muon beam: 3-200 point on emittance-momentum matrix – TOF1 trigger • Fri – 1000 pulses ~4 particle triggers/spill MOM Report-Coney

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