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

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

3 June 8, 2010MOM Report-Coney MICE Motivation  The muon beam after the front end of a Neutrino Factory is:  Wide –  x ~ 10(+) cm  Divergent –   ~ 150(+) mr  Need to cool the beam: u 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  s u Cannot use stochastic cooling – slow, iterative process u Muons pass through absorber material followed by RF cavities u Lose transverse and longitudinal momentum in absorber – restore longitudinal with RF g reduction in transverse emittance u Competition between cooling (dE/dx) and heating (multiple scattering)  Optimal results with: u Low Z, large X 0 material u Tightly focused beam u H 2 most promising absorber material  Simple premise; however, the reality is not simple  need a test

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: Target Upstream beam line MICE Local Control Room Decay solenoid Downstream beam line Linde refrigerator Instrumentation in place: Beam profile monitors Trigger/rate scintillators CKOVs, TOF0,1&2, KL

6 June 8, 2010MOM Report-Coney MICE Schedule  Current focus is on Step I: u Beamline commissioning u Detector comissioning and calibration

7 June 8, 2010MOM Report-Coney Target Operations  50,000 pulses of redesigned target in test stand in R78  Current target installed in ISIS August 2009 u Run at base rate (50 Hz/32) and with ISIS at 50 Hz (Normal User Run) u Inspected regularly – PASSED  Target is working beautifully – NO problems  Target stability checked every 10,000 pulses u 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 u February/March User Run – 10 days u April/May User Run – 15 days  See target update during this session MICE target path ISIS cycles MS marker ISIS losses

8 June 8, 2010MOM Report-Coney Upstream Beamline

9 June 8, 2010MOM Report-Coney Beamline  Conventional magnets u Controls software improved s Automatic gradual ramp up/down implemented (DL) s Eases burden on electrical infrastructure & on shift crew u Faulty water flow gauges in all magnet power supplies replaced s Removes cause of most magnet trips during running u Water flow through magnets increased to recommended level s Monitored in Alarm Handler, archived u New pressure valves installed on magnets s Water pressure reduced from 8 to 4 bar  Field monitoring with Hall probe  Configuration Database in the works u Polarity detection scheme implemented  Proton Absorber installed in February downstream of Decay Solenoid -see talk this session – Chris Rogers (RAL)

10 June 8, 2010MOM Report-Coney Beamline: Decay Solenoid  Running well during data-taking September – December 2009  Linde Fridge serviced in January  developed problems u Cooldown failed end of January u Fridge developed fault – N2 contamination in DS cold box u Blockage in cold trap?  Linde engineer to RAL late March  changed charcoal in gas panel absorber, cycled through processes, no leaks s But when compressor isolated from cold box and cold trap back into operation N2 levels rose again u Leak in compressor shaft seal?  Easter  Engineer back to RAL mid April  new shaft seal  stuck & would not move u Compressor removed & taken to Linde contractor s Back April 20 th with completely new compressor s Stuck seal suspected of being root cause of the problem u Still not solved s Wrong seal from manufacturer – designed for air not He s Ordered new seal – sent wrong one again s Finally got correct seal for compressor u Vacuum gauges also needed to be replace u Scroll pumps needed servicing as well (now done)  Cooldown (re)started mid-May – record time of 5 days u Liquid He level probe not working - Problem with old electronics? u Debugged – replaced suspected chip – end May determined sensor had gone bad  Friday – cold swapped for new sensor – now working  Magnet cold – undergoing current testing

11 June 8, 2010MOM Report-Coney Data Taking Program: Positive Particles  Detector Calibration: u 300 MeV/c pions - used for calibrating the TOF system u 290 MeV/c pions – TOF, KL u 270 MeV/c pions – TOF, KL u 250 MeV/c pions – TOF, KL u 200 MeV/c pions – TOF, KL u 300 MeV/c positrons - CKOV and KL calorimeter u 250 MeV/c positrons - CKOV and KL calorimeter u 200 MeV/c positrons - CKOV and KL calorimeter u 150 MeV/c positrons - CKOV and KL calorimeter  Beam Studies: u Luminosity monitor studies u Particle Rate vs Losses in ISIS Study u Muon beam configurations to study proton absorber(s)  Muon Beams: u pi+ to mu+ beam (6-200, 3-200, ) pulses 17

12 June 8, 2010MOM Report-Coney 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 Tof m 10 x 4cm scintillator bars  x = 1.15 cm  t = 50 ps Tof m 7 x 6cm scintillator bars  x = 1.73 cm  t = 50 ps

13 June 8, 2010MOM Report-Coney Detector Commissioning: Time of Flight Counters  Time resolution after the calibration : TOF0 – 51ps; TOF1 – 62ps; TOF2 – 52ps.

14 June 8, 2010MOM Report-Coney Detector Commissioning: TOFs  Time of flight distributions for different data sets:

15 June 8, 2010MOM Report-Coney Detector Commissioning: e/  Identifier  KL lead/scintillating fiber calorimeter module u Calibration in progress u 50% of electrons 240 MeV/c at target, and 80% of electrons 360 MeV/c at target release energy in KL tag counter u Muons with 220 MeV/c at target reach EMR u Muons with < 80 MeV/c at KL will die in KL (170 at target) u More data needed:  170 <  p <200 MeV/c at target  195 <  p < 230 MeV/c at target 27 Energy Response

16 June 8, 2010MOM Report-Coney Beam Studies  Particle rate vs beam loss – Adam Dobbs - Imperial u Hold target timing steady – vary depth into beam to increase losses u Measure particle rate in MICE beamline  Luminosity Monitors – see talk this session – David Forrest - Glasgow u Determine particle rate close to target & find protons on target as function of depth u Validate particle production in target and beamline simulations  Emittance measurement with TOFs – see talk this session – Mark Rayner - Oxford u Purpose: generate the elements of the “emittance- momentum matrix”  Study performance at every portion of a full cooling channel

17 June 8, 2010MOM Report-Coney Infrastructure: Access, DB, & Data Analysis  New ssh bastion is working u Successfully connected through from outside to computers in the MLCR u 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 u Configuration Database is installed on new database server & web services server at RAL u Database interface is visible from control room u EPICs client now in place to read/write values set in a run  Tested EPICs client with database – successful u NEXT: run in parallel with spreadsheet during Machine Physics runs  Monitoring u environmental conditions, ISIS loss monitors u AC units, magnet PS water flow

18 June 8, 2010MOM Report-Coney Computing Infrastructure SSH EPICS Gateway DB API DB Outside World Micenet / MLCR DB API eLog SSH Bastion Config Database “Web” services EPICS archiver web interface ssh SSH / web services EPICS Spare node Grid clients Grid Transfer Box 18 PPD-Grid managed SSH + analysis code Analysis Node/Farm ssh MICE managed PPD-IT supervised

19 June 8, 2010MOM Report-Coney 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: u Run 5 days/week – M-F u hours/day (8am-8pm) u Personnel needed: MOM, BeamLine Expert, Shift Leader, Shifter s Shift leader has more experience and trains up new person s Novices need 1 week training shifts before official shifter u Experts/those doing the study are also there to guide & monitor progress Data-taking Run: 12 hours shifter1 shifter2 MOM & BLOC

June 8, 2010MOM Report-Coney20 June/July/August Run Developing Global Run Plan: —User Run JUNE 22-AUGUST 12 —Machine Physics Aug —SHUTDOWN August 16 – January 30, 2011 —Machine Physics studies o Activation Study at 4V beam loss o Beam Loss vs Rate o Beam Bump Study —User Run o Week1: Tues June 22-Fri June25 –3 days TOF calibration –1 day KL data o Week2: June 28-July 2: Emittance/Momentum matrix with muon beams o Week3  more emittance/momentum matrix data

24/3/2010CM26 - Riverside21 24/3/2010CM26 - Riverside21 (*) 700mV ~ 20 mu-/spill 3,140 3,200 3,240 6,140 6,200 6,240 10,140 10,200 10,240 P (MeV/c) eN (mm rad) - 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 - the element (10,200) is the BL optics matching a MICE beam with 10 mm rad at P=200 MeV/c This pair is our goal: how do we get it? Fill in  -p matrix data

22 June 8, 2010MOM Report-Coney Conclusions  Beamline is (mostly) working! – negative or positive particles u New target operating smoothly - Systematic monitoring of performance u Decay Solenoid needed for operation – factor 5 increase muon rate  Major increase in loss limits 50 mV (2008)  1V (2009/10)  2V? soon  DAQ increase in efficiency: <50 particles/spill (2008)  ≤ 200 part/spill (2009) u Beam loss vs particle rate shows linear dependence  Detectors are working! u TOF0, TOF1, TOF2 calibrated u Need more data for KL but progressing u Tracker works – nearing dual-readout stage  Muon beam physics happening again soon! u Initial measurement of muon beam emittance  More ( ,P) matrix data in June/July/Aug 

23 June 8, 2010MOM Report-Coney

24 June 8, 2010MOM Report-Coney Muon Beam Studies at MICE!                               The MICE experiment takes target pulses of muon beam data!  ~170,000  at TOF1  Muon beam  studies begin! Worldwide celebrations ensue! Locals in Britain express strong support for the experiment Blimey!Muons! 35 Extra!

25 June 8, 2010MOM Report-Coney Detector Commissioning: Cherenkovs  Two aerogel Cherenkov counters  Installed downstream of Q6 and TOF0  Used to separate e/  /  MeV/c  e/  /  calibration data taken  Sample electron data shown 26

June 8, 2010MOM Report-Coney26 Run Summary May 27-28: 10,700 target pulses —Target count is at 233,750 —300 MeV/c e+ beam TOF calibration – TOF0 trigger o Th/Fri – 6,4000 pulses with ~45 particle triggers/spill —Muon beam: point on emittance-momentum matrix – TOF1 trigger o Fri – 1250 pulses ~6 particle triggers/spill —Muon beam: point on emittance-momentum matrix – TOF1 trigger o Fri – 1000 pulses ~6 particle triggers/spill —Muon beam: point on emittance-momentum matrix – TOF1 trigger o Fri – 1000 pulses ~4 particle triggers/spill