Emittance measurement: ID muons with time-of-flight Measure x,y and t at TOF0, TOF1
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Emittance measurement: • ID muons with time-of- flight • Measure x,y and t at TOF0, TOF1 • Use momentum-dependent transfer matrices to map m path • Assume straight line path, estimate p z and iterate to calculate true p z • Determine trace space at TOF0 & TOF1. - measured p z & transfer matrix M(p z ) An extensive experimental program is planned for 2013, including data taken with variations on the original Step IV configuration. • No absorber: alignment & beam optics • Liquid H2 absorber (full/empty) • Multiple scattering, Energy Loss The MICE Experiment IPAC 2013, Shanghai Alain Blondel, DPNC, University of Geneva, on behalf of the MICE Collaboration The MICE Method Ionization Cooling is the only practical solution to preparing high brilliance muon beams for a neutrino factory or muon collider. The Muon Ionization Cooling Experiment (MICE) is under development at the Rutherford Appleton Laboratory (UK) by an international collaboration. The muon beam line has been commissioned and, for the first time, measurements of beam emittance with particle physics detectors have been performed. The full apparatus is currently under construction. First results with a liquid-hydrogen absorber will be produced in 2015; followed by the operation of a full representative ionization cooling channel cell which will include RF re- acceleration. The design offers opportunities to observe cooling with various absorbers and several optics configurations. Results will be compared with detailed simulations of cooling channel performance to ensure full understanding of the cooling process. Introducti on A schematic of the Step I MICE beam line A schematic of MICE: the cooling channel & upstream and downstream detectors Step IV: 2014-15 Fully engineered MICE Cooling Channel Cell Well… some ‘details’ left! Step VI: Aim 2018 Major progress has been made recently in MICE with the successful commissioning of the beam line. First measurements of the m beam emittance have been made using the TOF detectors. Installation of all Step IV components will continue through 2014, followed by the first high precision (0.1%) emittance measurements made in MICE with the fiber trackers (470 mm space point resolution). Finally, world-wide effort continues on the construction of MICE Step VI with a goal of completion in 2018. 2. Transverse beam profile at TOF1 MICE m beam optics (e n ,p z ) Step I: Completed & Published Everything works well! • Muon rate ~120 in 2ms spill @ 0.4Hz • TOF resolutions: s t = 55, 53, and 50 ps and s x,y ~1 cm • First measurement of emittance made using TOFs. All Step IV components nearing completion. By 2014, this engineering drawing will be replaced with a photograph! R&D for Future Accelerators Step I: Beam Measurements 1. Time-of-Flight (6,200) beam: muons in blue MICE is a critical R&D experiment on the path toward neutrino factories and muon colliders. With the growing importance of neutrino physics and the possibility of a light Higgs (115-130 GeV), physics could be moving this way soon! e (mm) p (MeV/c) Measure input particle x,x’,y,y’, t, t’=E/Pz input emittance e in Measure output particle x,x’,y,y’, t, t’=E/Pz output emittance e out COOLING CHANNEL Measure parameters particle by particle: accumulate ~10 5 muons g D[(e in – e out /e in )] = 10 -3 In such machines, the initial chain of capture, bunching, phase rotation, and cooling rely on complex beam dynamics and technology. Muon cooling g high intensity n factory, high luminosity m collider Neutrino Factory MICE recorded > 10 6 particle triggers with p, e, and m beams to meet Step 1 goals: • Calibrated detectors & understood beam • Generated reproducible m beams • Analysed beam composition, m rates, data quality, and emittance • Took data for each e-p optics setting in MICE Time-of-flight (TOF) for 300 MeV/c p beam 3.4 m path from TOF0 to TOF1: drifts & quads 5. Transverse trace space for (6 mm, 200 MeV/c) m- beam. Non-linear effects at edges Spectrometer Solenoid 2 Tracker 2 EMR: UGeneve Challenges: high gradient (>12MV/m) RF cavities embedded in strong (>2T) solenoidal magnetic fields. RFCC Module Absorbe r Spectrometer Solenoid & Tracker RF Cavities Berkeley RF Couplers - Berkeley RF Amplifier: Daresbury Be Windows Absorber Windows Mississi ppi Coupling Coil – Harbin China Berkel ey LH2 Syste m RAL Focus Coil UK UK, US Tracke r 1 Completed: Inner view shown Spectrometer Solenoid 1 US: Berkeley, DOE Diffus er UK • TOF system allows excellent p, m, e separation up to 300 MeV/c • CKOV studies show good separation of particles g identification at low momenta • KL (calorimeter) used to measure p contamination in m beams M. Rayner, U Genève DATA MC Preliminary Right: Pion fraction in m beam < 1-2% Preliminary ' ' 0 0 22 21 12 11 1 1 x x M M M M x x 1 0 22 11 12 1 0 1 1 1 ' ' x x M M M x x z x p p x x , z y p p y y , y
description
IPAC 2013, Shanghai. Neutrino Factory. Measure input particle x,x ’, y,y ’, t, t’=E/Pz input emittance in. Measure output particle x,x ’, y,y ’, t, t’=E/Pz output emittance out. COOLING CHANNEL. Preliminary. M. Rayner, U Genève. DATA. MC. LH2 System. RAL. - PowerPoint PPT Presentation
Transcript of Emittance measurement: ID muons with time-of-flight Measure x,y and t at TOF0, TOF1
Emittance measurement:• ID muons with time-of-flight• Measure x,y and t at TOF0, TOF1• Use momentum-dependent transfer
matrices to map m path
• Assume straight line path, estimate pz
and iterate to calculate true pz
• Determine trace space at TOF0 & TOF1.- measured pz & transfer matrix M(pz)
An extensive experimental program is planned for 2013, including data taken with variations on the original Step IV configuration.•No absorber: alignment & beam optics• Liquid H2 absorber (full/empty)
• Multiple scattering, Energy Loss g COOLING• Solid absorbers: LiH, Plastic, C, Al, Cu• LiH wedge absorber: emittance exchange
The MICE ExperimentIPAC 2013, Shanghai
Alain Blondel, DPNC, University of Geneva, on behalf of the MICE Collaboration
The MICE Method
Ionization Cooling is the only practical solution to preparing high brilliance muon beams for a neutrino factory or muon collider. The Muon Ionization Cooling Experiment (MICE) is under development at the Rutherford Appleton Laboratory (UK) by an international collaboration. The muon beam line has been commissioned and, for the first time, measurements of beam emittance with particle physics detectors have been performed. The full apparatus is currently under construction. First results with a liquid-hydrogen absorber will be produced in 2015; followed by the operation of a full representative ionization cooling channel cell which will include RF re-acceleration. The design offers opportunities to observe cooling with various absorbers and several optics configurations. Results will be compared with detailed simulations of cooling channel performance to ensure full understanding of the cooling process.
Introduction
A schematic of the Step I MICE beam line
A schematic of MICE: the cooling channel & upstream and downstream detectors
Step IV: 2014-15
Fully engineered MICE Cooling Channel Cell Well… some ‘details’ left!
Step VI: Aim 2018Major progress has been made recently in MICE with the successful commissioning of the beam line. First measurements of the m beam emittance have been made using the TOF detectors. Installation of all Step IV components will continue through 2014, followed by the first high precision (0.1%) emittance measurements made in MICE with the fiber trackers (470 mm space point resolution). Finally, world-wide effort continues on the construction of MICE Step VI with a goal of completion in 2018.
2. Transverse beam profile at TOF1
MICE m beam optics (en,pz)
Step I: Completed & Published
Everything works well!• Muon rate ~120 in 2ms spill @ 0.4Hz• TOF resolutions: st = 55, 53, and 50 ps and sx,y ~1 cm• First measurement of emittance made using TOFs.
All Step IV components nearing completion. By 2014, this engineering drawing will be replaced with a photograph!
R&D for Future Accelerators
Step I: Beam Measurements
1. Time-of-Flight (6,200) beam: muons in blue
'' 0
0
2221
1211
1
1
xx
MMMM
xx
1
0
22
11
121
0
111
''
xx
MM
Mxx
MICE is a critical R&D experiment on the path toward neutrino factories and muon colliders. With the growing importance of neutrino physics and the possibility of a light Higgs (115-130 GeV), physics could be moving this way soon!
e (m
m)
p (MeV/c)
Measure input particle x,x’,y,y’, t, t’=E/Pz
input emittance ein
Measure output particle x,x’,y,y’, t, t’=E/Pz
output emittance eoutCOOLING CHANNEL
Measure parameters particle by particle: accumulate ~105 muons g D[(ein – eout/ein)] = 10-3
In such machines, the initial chain of capture, bunching, phase rotation, and cooling rely on complex beam dynamics and technology. Muon cooling g high intensity n factory, high luminosity m collider
Neutrino Factory
MICE recorded > 106 particle triggers with p, e, and m beams to meet Step 1 goals:• Calibrated detectors & understood beam• Generated reproducible m beams• Analysed beam composition, m rates, data
quality, and emittance• Took data for each e-p optics setting in MICE
Time-of-flight (TOF) for 300 MeV/c p beam
3.4 m path from TOF0 to TOF1: drifts & quads
5. Transverse trace space for (6 mm, 200 MeV/c) m- beam. Non-linear effects at edges
Spectrometer Solenoid 2
Tracker 2
EMR: UGeneve
Challenges: high gradient (>12MV/m) RF cavities embedded in strong (>2T) solenoidal magnetic fields.
RFCC ModuleAbsorber
Spectrometer Solenoid & Tracker
RF Cavities Berkeley
RF Couplers - Berkeley
RF Amplifier: Daresbury
Be Windows
Absorber Windows
Mississippi
Coupling Coil – Harbin ChinaBerkeley
LH2 System
RAL
Focus Coil
UK
UK, US
Tracker 1Completed: Inner view shown
Spectrometer Solenoid 1
US: Berkeley, DOEDiffuser UK
• TOF system allows excellent p, m, e separation up to 300 MeV/c
• CKOV studies show good separation of particles g identification at low momenta
• KL (calorimeter) used to measure p contamination in m beams
zx ppxx , zy ppyy ,
yy
M. Rayner, U Genève
DATA
MC
Preliminary
Right: Pion fraction in m beam < 1-2%
Preliminary
