(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March 2006 - p. 1/30 Muon (g-2) to 0.2 ppm B. Lee Roberts Department of Physics Boston.

Slides:



Advertisements
Similar presentations
K. Kirch Search for the EDM at low ? Motivation Frozen spin technique High and low A compact storage ring experiment?
Advertisements

Muon g-2 Inflector AEM Meeting 11/25/2013 Chris Polly Muon g-2 Project Manager.
October 14, 2009 Tsutomu Mibe ( 三部 勉) KEK 1.
Hertzog / Experiment DOE Intensity Frontier Review The g-2 Experimental Essentials David Hertzog University of Illinois  University of Washington Beam.
B. Lee Roberts, P5: 27 March p. 1/25 Muon (g-2) to 0.25 ppm B. Lee Roberts on behalf of the New Muon (g-2) Collaboration: E969.
B. Lee Roberts, SPIN2004 –Trieste -11 September p. 1/54 New Results on Muon (g-2) Past, Present and Future Experiments B. Lee Roberts Department.
B. Lee Roberts, Hampton University, 23 March p. 1/31 The Muon’s Magnetic Moment What’s all the fuss about anyway? B. Lee Roberts Department of Physics.
B. Lee Roberts, NuFact WG4: 24 June p. 1/36 Muon (g-2) Past, Present and Future B. Lee Roberts Department of Physics Boston University
Muon g-2 experimental results & theoretical developments
Fermilab Accelerator Complex in the Near Term: Muon Physics Program Eric Prebys Accelerator Physics Center FNAL.
Measurement of the muon anomaly to high and even higher precision David Hertzog* University of Illinois at Urbana-Champaign * Representing the E821 Collaboration:
B. Lee Roberts, College of William and Mary, 24 March p. 1/61 The Muon: A Laboratory for Particle Physics Everything you always wanted to know about.
Basic Measurements: What do we want to measure? Prof. Robin D. Erbacher University of California, Davis References: R. Fernow, Introduction to Experimental.
B. Lee Roberts, BNL PAC 9 September p. 1/29 Muon (g-2) to 0.20 ppm P969 B. Lee Roberts Representing the new g-2 collaboration: Boston, BNL, BINP,
 B. Lee Roberts, Heidelberg – 11 June p. 154 The Magnetic and Electric Dipole Moments of the Muon Lee Roberts Department of Physics Boston University.
B. Lee Roberts, Oxford University, 19 October p. 1/55 The Muon: A Laboratory for Particle Physics Everything you always wanted to know about the.
WG4:  physics B. Lee Roberts, on behalf of the Intense Muon Physics Working Group - p. 1/48 WG4 Summary and Future Plans The muon trio and more B. Lee.
B. Lee Roberts, PANIC05, Santa Fe, 27 October, p. 1/35 Muon (g-2) Status and Plans for the Future B. Lee Roberts Department of Physics Boston University.
B. Lee Roberts, HIFW04, Isola d’Elba, 6 June p. 1/39 Future Muon Dipole Moment Measurements at a high intensity muon source B. Lee Roberts Department.
A new method of measuring the muon g-2 Francis J.M. Farley Trinity College Dublin.
1 A 1 ppm measurement of the positive muon lifetime Qinzeng Peng Advisor: Robert Carey Boston University October 28, 2010 MuLan collaboration at BU: Robert.
1 g-2 phase study from GEANT simulation Qinzeng Peng Advisor: James Miller Boston University Sep 28, 2004 Muon g-2 collaboration at BU: Lee Roberts, Rober.
Muon and electron g-2 A charged particle which has spin angular momentum s will have also a magnetic moment m. The ratio of the magnetic to angular moments.
Yannis K. Semertzidis, CERN flavour, 15 May p. 1/26 The next muon g-2 experiment to 0.25 ppm Yannis K. Semertzidis Brookhaven National Laboratory.
Measurement of the Positive Muon Lifetime to 1 ppm David Webber Preliminary Examination March 31, 2005.
FFAG-Workshop 2006, Kumatori, Osaka, Japan Injection study for 6-sector PRISM FFAG by using pulsed alpha particles Yasushi Arimoto, Toshiyuki Oki, Makoto.
2002/7/02 College, London Muon Phase Rotation at PRISM FFAG Akira SATO Osaka University.
2002/7/04 College, London Beam Dynamics Studies of FFAG Akira SATO Osaka University.
Yannis K. Semertzidis, BNL DOE review: 19 April p. 1/25 Muon g-2 (E969) to 0.25 ppm Yannis K. Semertzidis Brookhaven National Laboratory We made.
(g – 2)  B. Lee Roberts, Dipole Moments In Storage Rings AGS/RHIC Workshop,7 June p. 1/36 Muon (g-2): Past, Present and Future B. Lee Roberts On.
Muon g-2 Experiment at Fermilab, Liang Li, SPCS 2013 June 5 th, Shanghai Particle Physics and Cosmology Symposium - SPCS2013 The (new) muon g-2.
Muon (g-2) Experiments Matthew Wright Luo Ouyang.
Energy calibration at LHC J. Wenninger. Motivation In general there is not much interest for accurate knowledge of the momentum in hadron machines. 
B. Lee Roberts, P5: 27 March p. 1/25 Muon (g-2) to 0.25 ppm B. Lee Roberts on behalf of the New Muon (g-2) Collaboration: E969.
David M. Webber University of Illinois at Urbana-Champaign For the MuLan Collaboration A new determination of the positive muon lifetime to part per million.
G-2 accelerator and cryo needs Mary Convery Muon Campus Review 1/23/13.
June 17, 2004 / Collab Meeting Strategy to reduce uncertainty on a  to < 0.25 ppm David Hertzog University of Illinois at Urbana-Champaign n Present data.
Klaus P. Jungmann, Kernfysisch Versneller Instituut, Groningen, NL Arbeitstreffen „Hadronen und Kerne“, Pommersfelden, 26 September 2001 Standard Model.
Dipole Moments in Storage Rings Yannis K. Semertzidis Brookhaven National Laboratory Dipole Moments in Storage Rings BNL, 7 June 2006 Organizers: Gerco.
 B. Lee Roberts, KEK – 21 March p. 1/27 The Magnetic and Electric Dipole Moments of the Muon Lee Roberts for the muon g-2 collaboration Department.
G-2: Past and Future G. Bunce for the g-2 Collaboration Spin2006, Kyoto.
Yannis K. Semertzidis Brookhaven National Laboratory Fundamental Interactions Trento/Italy, June 2004 Theoretical and Experimental Considerations.
Brian Plimley Physics 129 November Outline  What is the anomalous magnetic moment?  Why does it matter?  Measurements of a µ  : CERN.
Huaizhang Deng Yale University Precise measurement of (g-2)  University of Pennsylvania.
Muon Anomalous Magnetic Moment --a harbinger of new physics Chang Liu Physics 564.
Yannis K. Semertzidis, RHIC/AGS Users meeting, 9 June 2006 Muon g-2 experiment (E969) to 0.25 ppm and deuteron EDM (dEDM) to e∙cm Yannis K. Semertzidis.
SPring-8 upgrade : a fast kicker system for beam injection Japan Synchrotron Radiation Research Institute (JASRI) SPring-8 T. Nakamura CFA Beam Dynamics.
(g – 2)  James Miller CERN Workshop October p. 1/27 Muon (g-2) to 0.25 ppm James Miller (For the new Muon (g-2) Collaboration, E969) Department.
The Muon g-2 Experiment – Investigating how the spin of a muon is affected as it moves through a magnetic field Astrid Rodrigues.
NUMI NUMI/MINOS Status J. Musser for the MINOS Collatoration 2002 FNAL Users Meeting.
P.F.Ermolov SVD-2 status and experimental program VHMP 16 April 2005 SVD-2 status and experimental program 1.SVD history 2.SVD-2 setup 3.Experiment characteristics.
Measurement of the Muon Anomalous Magnetic Moment to 0.7 ppm Results from the Data of 2000 Yannis K. Semertzidis Brookhaven National Lab Muon g-2 Collaboration.
1) Status of the Muon g-2 Experiment 2) EDM Searches in Storage Rings Yannis K. Semertzidis Brookhaven National Lab Muon g-2 Collaboration and EDM Collaboration.
 Output of Project X  1 “blast” = 9mA*1ms = 5.6e13 (protons)/(1.4 s cycle)  = 4e13 p/s on average (!!)  = 50 kW average beam power  = 8e20/yr (2e7.
Part I: Muon g-2 theory update / motivation Part II: Possibilities for FNAL experiment at 0.1 ppm David Hertzog University of Illinois at Urbana-Champaign.
B. Lee Roberts, PHIPSI 2009, Beijing – 14 October p. 1/30 Status of the (g - 2)  Fermilab Project Lee Roberts Department of Physics Boston University.
Hybrid Fast-Ramping Synchrotron to 750 GeV/c J. Scott Berg Brookhaven National Laboratory MAP Collaboration Meeting March 5, 2012.
Yannis K. Semertzidis Brookhaven National Laboratory HEP Seminar SLAC, 27 April 2004 Muon g-2: Powerful Probe of Physics Beyond the SM. Present Status.
E989 Muon (g-2) EMG Lee Roberts for the E989 Collaboration B. Lee Roberts - EMG- 13 February
Electric Dipole Moment of the Deuteron Experiment: EDM Violates T-Symmetry: Connected to CP-Violation and the Matter-Antimatter Asymmetry of the Universe.
1 Muon g-2 Experiment at BNL Presented by Masahiko Iwasaki (Tokyo Institute of Technology) Akira Yamamoto (KEK) for E821 g-2 Collaboration: Boston, BNL,
Yannis K. Semertzidis Brookhaven National Laboratory New opportunities at CERN CERN, 12 May 2009 Storage Ring EDM Experiments The storage ring method can.
G4beamline Spin Tracking Tom Roberts, Muons, Inc. In G4beamline 2.12, the tracking of muon and electron spins is introduced: – decay of pions into polarized.
Kevin Lynch MuLan Collaboration Boston University CIPANP 2006 A new precision determination of the muon lifetime Berkeley, Boston, Illinois, ITU, James.
– + + – Search for the μEDM using a compact storage ring A. Adelmann 1, K. Kirch 1, C.J.G. Onderwater 2, T. Schietinger 1, A. Streun 1 1 Paul Scherrer.
Geant4 in the FNAL g-2 Experiment Kevin Lynch Boston University August 2009 g-2 Collaboration Meeting.
The Anomalous Magnetic Dipole Moment of the Muon
Large Booster and Collider Ring
Acceleration of Polarized Protons and Deuterons at HESR/FAIR
Lost muons and radial B-field
Presentation transcript:

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 1/30 Muon (g-2) to 0.2 ppm B. Lee Roberts Department of Physics Boston University bu.edu

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 2/30 (in modern language) (and in English)

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 3/30 Dirac + Pauli moment

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 4/30 Standard Model Value for (g-2) e vrs.  : relative contribution of heavier things ?

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 5/30 One reason that I’m here is the relationship between e + e - annihilation and a 

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 6/30 When we started in 1983, theory and experiment were known to about 10 ppm. Theory uncertainty was ~ 9 ppm Experimental uncertainty was 7.3 ppm

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 7/30 E821 achieved 0.5 ppm and the e + e - based theory is also at the 0.6 ppm level. Both can be improved. All E821 results were obtained with a “blind” analysis. world average

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 8/30 With an apparent discrepancy at the level of 2.6 ... it’s interesting and you have to work harder to improve the measurement and the theory value ….

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 9/30 A (g-2)  Experiment to ± 0.2 ppm Precision –BNL E969 Collaboration R.M. Carey, I. Logashenko, K.R. Lynch J.P. Miller B.L. Roberts- Boston University; G. Bunce W. Meng, W. Morse, P. Pile, Y.K. Semertzidis -Brookhaven; D. Grigoriev B.I. Khazin S.I. Redin Yuri M. Shatunov, E. Solodov – Budker Institute; F.E. Gray B. Lauss E.P. Sichtermann – UC Berkely and LBL; Y. Orlov – Cornell University; J. Crnkovic,P. Debevec D.W. Hertzog, P. Kammel S. Knaack, R. McNabb – University of Illinois UC; K.L. Giovanetti – James Madison University; K.P. Jungmann C.J.G. Onderwater – KVI Groningen; T.P. Gorringe, W. Korsch – U. Kentucky, P. Cushman – Minnesota; Y. Arimoto, Y. Kuno, A. Sato, K. Yamada – Osaka University; S. Dhawan, F.J.M. Farley – Yale University

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 10/30 We measure the difference frequency between the spin and momentum precession 0 With an electric quadrupole field for vertical focusing

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 11/30 Inflector Kicker Modules Storage ring Central orbit Injection orbit Pions Target Protons (from AGS)p=3.1GeV/c Experimental Technique Spin Momentum Muon polarization Muon storage ring injection & kicking focus by Electric Quadrupoles 24 electron calorimeters R=711.2cm d=9cm (1.45T) Electric Quadrupoles polarized 

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 12/30 Pedestal vs. Time Near sideFar side E821: used a “forward” decay beam GeV/c Decay GeV/c This baseline limits how early we can fit data

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 13/30 The Production Target proton beam top view of target

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 14/30 Decay Channel Plenty of room to add more quadrupoles to increase the acceptance of the beamline.

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 15/30 E969: will use a “backward” decay beam 5.32 GeV/c No hadron-induced prompt flash Approximately the same muon flux is realized x 1 more muons Expect for both sides Then we quadruple the number of quadrupoles in the decay channel > x 2 new front-end increase of proton beam Decay GeV/c

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 16/30 The incident beam must enter through the magnet yoke and through an inflector magnet

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 17/30 The mismatch between the inflector exit and the storage aperture + imperfect kick causes coherent beam oscillations Upper Pole Piece

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 18/30 The E821 inflector magnet had closed ends which lost half the beam. Length = 1.7 m Central field = 1.45 T Open end prototype, built and tested → X2 Increase in Beam

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 19/30 The 700 ton (g-2)  precision storage ring Muon lifetime t  = 64.4  s (g-2) period t a = 4.37  s Cyclotron period t C = 149 ns Scraping time (E821) 7 to 15  s Total counting time ~700  s Total number of turns ~4000

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 20/30 The fast kicker is the major new feature not in the CERN experiment. Kicker Modulator is an LCR circuit, with V ~ 95 kV, I 0 ~ 4200 A oil Fluorinert (FC40)

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 21/30 E821 Electron Detectors were Pb-scintillating fiber calorimeters read-out by 4 PMTs. New experiment needs segmented detectors for pileup reduction.

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 22/30 We count high-energy e - as a function of time.

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 23/30 New segmented detectors of tungsten/scintillating- fiber ribbons to deal with pile-up System fits in available space Prototype under construction Again the bases will be gated.

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 24/30 The magnetic field is measured and controlled using pulsed NMR and the free-induction decay. Calibration to a spherical water sample that ties the field to the Larmor frequency of the free proton  p. So we measure  a and  p

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 25/30 The ± 1 ppm uniformity in the average field is obtained with special shimming tools. We can shim the dipole, quadrupole sextupole independently 0.5 ppm contours

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 26/30 E969 needs 10 times more muons than E821 stored. Open Inflector X2 Backward Beam X1 Quadruple the Quadrupoles X 2-3 Beam increase design factor X 5 Absence of injection flash will permit us to begin analyzing data much earlier

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 27/30 The error budget for E969 represents a continuation of improvements already made during E821 Field improvements: better trolley calibrations, better tracking of the field with time, temperature stability of room, improvements in the hardware Precession improvements will involve new scraping scheme, lower thresholds, more complete digitization periods, better energy calibration Systematic uncertainty (ppm) E969 Goal Magnetic field –  p Anomalous precession –  a Statistical uncertainty (ppm) Total Uncertainty (ppm)

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 28/30 Summary E821 Achieved a precision of ± 0.5 ppm There appears to be a discrepancy between experiment and e + e - based theory E969 proposes to push the precision down to ± 0.2 ppm There is lots of work worldwide on the hadronic theory piece, both experimental and theoretical. Thanks to all of you who are working on these problems! !

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 29/30 Outlook: E969 will be considered by the national U.S. Particle Physics Project Prioritization Panel (P5) at the end of March We hope that our friends in the theory, e + e - and  communities will continue to work on the hadronic contribution to a  If both theory can improve by a factor of 2, and experiment can improve by a factor of 2.5, the stage is set for another showdown.

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 30/30 Thanks to the organizers for this excellent workshop! Thank you СПАСИБО

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 31/30

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 32/30 σ systematic E969 Pile-up AGS Background 0.10 * Lost Muons Timing Shifts E-Field, Pitch *0.05 Fitting/Binning * CBO Beam Debunching 0.04 * Gain Change total Systematic errors on ω a (ppm) Σ* = 0.11 Backward beam Beam manipulation Detector segmentation and lower energy- threshold required for pile-up rejection with higher rates

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 33/30 Systematic errors on ω p (ppm) *higher multipoles, trolley voltage and temperature response, kicker eddy currents, and time-varying stray fields. E969 (i ) (I) (II) (III) (iv)

(g – 2)  B. Lee Roberts e + e - collisions  to  : Novosibirsk 1 March p. 34/30 E969 Builds on the apparatus and Experience of E821 1.AGS Proton Beam 12 – bunches from the AGS 60 Tp total intensity 2.0 o  Beam  decay channel  Beam injected into the ring through a superconducting inflector 5.Fast Muon Kicker 6.Precision Magnetic Storage Ring 7.Electron calorimeters, custom high-rate electronics and wave-form digitizers