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

MICE Operations Manager Report

Linda ConeyUniversity of California, Riverside

UKNF Meeting

June 8, 2010

2June 8, 2010 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


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: 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 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 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

Upstreambeam line

MICE Local Control Room

Decay solenoid

Downstream beam line

Linde refrigerator

Instrumentation in place:Beam profile monitorsTrigger/rate scintillatorsCKOVs, TOF0,1&2, KL


MICE Schedule

Current focus is on Step I: Beamline commissioning Detector comissioning and calibration


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


Upstream Beamline


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 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)


Beamline: Decay Solenoid Running well during data-taking September – December 2009 Linde Fridge serviced in January 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 changed 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 Engineer back to RAL mid April new shaft seal 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


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


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-0

0.48 m

10 x 4cm scintillator barsx = 1.15 cmt = 50 ps

Tof-1

0.48 m

7 x 6cm scintillator barsx = 1.73 cmt = 50 ps


Detector Commissioning: Time of Flight Counters

Time resolution after the calibration:

• TOF0 – 51ps;• TOF1 – 62ps;• TOF2 – 52ps.


Detector Commissioning: TOFs

Time of flight distributions for different data sets:

--

300 MeV/c - beam

e-

--

300 MeV/c - beam

e-

e-

--

300 MeV/c e- beame-

--

300 MeV/c e- beam

-

e-

400 MeV/c - 225 MeV/c -

-

e-

400 MeV/c - 225 MeV/c -


Detector Commissioning: e/ 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 < p <200 MeV/c at target 195 < p < 230 MeV/c at target

27

Energy Response


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


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


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 clientsGrid Transfer Box

18

PPD-Grid managed

SSH+ analysis

code

Analysis Node/Farmssh

MICE managed

PPD-IT supervised


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

Data-taking Run: 12 hours

shifter1

shifter2

MOM & BLOC MOM & BLOC

June 8, 2010 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 studieso Activation Study at 4V beam losso Beam Loss vs Rateo Beam Bump Study

— User Runo 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

24/3/2010 CM26 - Riverside 212124/3/2010 CM26 - Riverside 21(*) 700mV ~ 20 mu-/spill

3,1403,140 3,2003,200 3,2403,240

6,1406,140 6,2006,200 6,2406,240

10,14010,140 10,20010,200 10,24010,240

P (MeV/c)

eN

(m

m r

ad

)

- 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


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) 1V (2009/10) 2V? soon DAQ increase in efficiency: <50 particles/spill (2008) ≤ 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 (,P) matrix data in June/July/Aug


Muon Beam Studies at MICE!

The MICE experiment takes 17000 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

BlimeBlimey!y!

MuonsMuons!!

35

Extra!

Extra

!

Extra! Extra!


Detector Commissioning: Cherenkovs

Two aerogel Cherenkov counters Installed downstream of Q6 and TOF0 Used to separate e// 220-350 MeV/c e// calibration data taken Sample electron data shown

26

June 8, 2010 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 triggero Th/Fri – 6,4000 pulses with ~45 particle triggers/spill

— Muon beam: 6-200 point on emittance-momentum matrix – TOF1 trigger

o Fri – 1250 pulses ~6 particle triggers/spill





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

Documents

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