status of spin physics and experiments
DESCRIPTION
Status of Spin Physics and Experiments. Erhard Steffens University of Erlangen-Nürnberg Chair , International Committee for Spin Physics Symposia. Tasks („Mission“) of our Community Spin Symposia and Workshops Where do we stand? Prospects and Outlook. - PowerPoint PPT PresentationTRANSCRIPT
www.spin-community.org
Status of Spin Physics and Experiments
Erhard SteffensUniversity of Erlangen-Nürnberg
Chair, International Committee for Spin Physics Symposia
I. Tasks („Mission“) of our CommunityII. Spin Symposia and WorkshopsIII. Where do we stand?IV. Prospects and Outlook
www.spin-community.org
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 2
Welcome to PSTP’11 !PSTP‘11 is
organized by Petersburg Nuclear Physics Institute and National Research University
sponsored by the International Spin Physics Committee (ISPC)
2011-12 Members, International Committee for Spin Physics Symposia E. Steffens – Erlangen (Chair) T. Roser – BNL (Past-Chair)R. G. Milner – MIT (Chair-Elect) M. Anselmino – TorinoA.S. Belov – INR Moscow A.V. Efremov – DubnaHyan Gao – Duke K.I. Imai – KyotoA.D. Krisch – Michigan P. Lenisa – FerraraG. Mallot – CERN M. Poelker – JLabR. Prepost – Madison N. Saito – KEKH. Sakai – Tokyo E.J. Stephenson – IUCFH. Stroeher – Jülich E.N. Tyurin – IHEP
Honorary MembersF. Bradamante – Trieste E.D. Courant – BNL D.G. Crabb – Virginia G. Fidecaro – CERN W. Haeberli – Wisconsin A. Masaike – Kyoto C.Y. Prescott – Stanford V. Soergel – Heidelberg W.T.H. van Oers - Manitoba
www.spin-community.org
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 3
Mission of our Community‚Spin‘ or ‚Polarization‘ experiments require special techniques like polarized beams and/or targets, which are not routinely available.
Such techniques were first discussed at special symposia, later in addition at topical or regular workshops. The first symposium of this kind at Basel in 1960 (51 years ago!) was organized shortly after the first polarized ion source – for deuterons – was running.
These meetings serve to o spread the Know-how of our special techniques („Spin Tools“)o build up a community o develop new ideas
The meetings are initiated by the Spin Committee and organized by Local Groups. They have to follow the rules imposed by the SpinCom in order to provide a platform for new ideas open for every scientist.
www.spin-community.org
History of Spin Conferences
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 4
Two conference series related to Spin/Polarization phenomena in nuclear and particle physics:
1.Symposia on Polarization Phenomena in Nuclear Reactions
2.Symposia on High Energy Spin Physics
www.spin-community.org
Symposia on Polarization Phenomena in Nuclear Reactions
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 5
• Start: Basel 1960 (Basel: first working polarized ion source & scattering experiments with polarized beam from source!)
• Following, every 5 years: Karlsruhe 1965, Madison 1970, Zürich 1975*, Santa Fe 1980*, Osaka 1985*, Paris 1990* (resolution to merge with HE Spin Physics), Bloomington 1994 (last independent meeting, in parallel to HE Spin Physics Symposium)
*) attendance
www.spin-community.org
Symposia on High Energy Spin Physics
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 6
• Start: Argonne 1974 (at ANL: First polarized HE beam in the 12 GeV Zero-Gradient-Synchrotron!)
• Following, every 2 years: Argonne 1976, 1978, Lausanne 1980, BNL 1982, Marseille 1984, Protvino 1986, Minneapolis 1988*, Bonn 1990*, Nagoya 1992*, Bloomington 1994 (in parallel to Polarization Symposium) , Amsterdam 1996, Protvino 1998* (last HE Spin Symposium)
*) attendance
www.spin-community.org
‘Joint’ Symposia on Spin Physics
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 7
• Start: Osaka 2000* Millenium Conference!• Following, every 2 years: Brookhaven 2002*,
Trieste 2004*, Kyoto 2006*, Charlottesville 2008*; Jülich 2010*, next meeting: Dubna 2012!!
• ISPC Committee composed of members from the former nuclear and HE spin physics community
*) attendance
How is the Spin Physics Community linked together?
• Spin Symposia are uniquely dedicated to the fundamental role of spin in nuclear and particle physics.
• There is consensus, that the connection is mediated by the development of ‘Spin Tools’ enabling us to perform ‘Spin experiments’ or ‘Polarization experiments’.
Diffraction
DIS Material science with pol. neutrons
Nucl. structure
Spin structureNN interaction
SPIN TOOL
S
Spin tools are discussed in detail at Workshops (regular or topical)
E. Steffens FAU Erlangen-Nürnberg 8PSTP'11 Petersburg Sept.2011
www.spin-community.org
Spin Story presented by an
Insider The talk is not on the
Web anymore – ask me for file
www.spin-community.org
The Spin Toolbox
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 10
Polarized Gas Targets
Polarized Solid Targets
Polarized Ion Sources
Polarized Electron Sources Polarimeters
Spin Theory
www.spin-community.org
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 11
The first Meeting on Spin Tools (?)The first meeting known to me:Int. Conference on Polarized Targets and Ion SourcesSaclay 1966 – Chairman A. Abragam• Solid proton targets polarized by DNP (Jeffries, Borghini,
Saclay group, ...) • Application of solid polarized targets for neutron physics:
Spectroscopy, Spin Filtering of neutrons (F.L. Shapiro – Dubna),...
• Nice overview ‘Polarized Ion Sources’ by R. Beurty (Saclay): Lamb Shift sources and Classical Sources (ABS) – still worth reading!
www.spin-community.org
Early Workshops on Spin Tools
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 12
• The 2nd conference on (solid) pol. targets took place at Berkeley 1971 (chair: O. Chamberlain)
• Work on Spin Tools was discussed at the Polarization Symposia: Karlsruhe 1965 (e.g. 1st ideas on a Colliding Beam Source by W. Haeberli), Madison 1970 (e.g. achromatic focusing by means of a compressor sextupole – H.F. Glavish), Zürich 1975 (e.g. pol. electrons from a GaAs cathode by Müller/IBM) and Santa Fe (e.g. 1st exp. demonstration of the CBS by the Madison group)
• Similar work has been presented at the HE Spin Symposia
www.spin-community.org
Early Workshops on Spin Tools
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 13
Topical workshops – initiated mostly by the HE Spin community:
• Ann Arbor 1981 & Vancouver 1883 ‘High intensity pol. proton sources’
• Abingdon 1981, BNL 1982, Bad Honnef 1984 ‘Pol. Target Materials and Techniques’
• Bodega Bay 1985 ‘Polarized antiprotons’
www.spin-community.org
List of topics discussed at the workshop:
1.Polarized antiprotons from the decay in flight of antihyperons 2.Spin filtering of antiprotons by a polarized hydrogen target in a storage ring3.Stochastic techniques à la ‘Stochastic Cooling’4.DNP in flight using polarized electrons and microwave radiation5.Spontaneous Spin-Flip synchrotron radiation6.Spin-Flip synchrotron radiation induced by X-ray laser7.Polarization by scattering8.Repeated Stern-Gerlach deflection9.Polarized antiprotons via the formation of antihydrogen and application of the ABS method10.Polarizing during storage in a Penning trap11.Polarizing by Channeling 12.Polarizing through interaction with polarized X-rays from a diamond crystal
*) Proc. Workshop on Polarized Antiprotons, Bodega Bay, CA, 1985. A.D. Krisch, A.M.T. Lin, O. Chamberlain (Edts.), AIP Conf. Proc. 145 (1986) 207
Workshop Bodega Bay
www.spin-community.org
Early Workshops on Spin Tools
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 15
Topical workshops – initiated mostly by the HE Spin community:
• Ann Arbor 1981, Vancouver 1883 ‘High Intensity Pol. Proton Sources’
• Abingdon 1981, BNL 1982, Bad Honnef 1984 ‘Pol. Target Materials and Techniques’
• Bodega Bay 1985 ‘Polarized Antiprotons’ • Montana 1986 ‘Polarized Sources and Targets’• Minneapolis 1988 and Bonn 1990: several satellite workshops to
Spin88 and Spin90• KEK 1990 ‘Pol. Ion Sources and Gas Jets’
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 16
Workshop KEK 1990
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 17
www.spin-community.org
Workshops after 1990
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 18
After 1990: Workshops predominantly in the uneven years between the Spin Symposia!e.g. on ‘Pol. Beams/Sources and Targets’:Heidelberg 1991 (restricted to ‘Pol. Gas Targets’)
www.spin-community.org
Heidelberg 1991: Polarized Gas Targets
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 19
• Hot topic: polarized gas targets for storage rings• Running: polarized deuterium target at VEPP3
(Novosibirsk)• Projects: FILTEX/HERMES, IUCF 3He test run,
IUCF PINTEX, AmPS (NIKHEF)
www.spin-community.org
Heidelberg 1991: Polarized Gas Targets
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 20
www.spin-community.org
Workshops after 1990
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 21
After 1990: Workshops predominantly in the uneven years between the Spin Symposia!e.g. on ‘Pol. Beams/Sources and Targets’:Heidelberg 1991 (restricted to ‘Pol. Gas Targets’)
Madison 1993, Cologne 1995, Urbana 1997, Erlangen 1999
www.spin-community.org
Erlangen 1999: PST99
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 22
www.spin-community.org
Erlangen 1999: PST99
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 23
www.spin-community.org
Workshops after 1990
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 24
After 1990: Workshops predominantly in the uneven years between the Spin Symposia!e.g. on ‘Pol. Beams/Sources and Targets’:Heidelberg 1991 (restricted to ‘Pol. Gas Targets’)Madison 1993, Cologne 1995, Urbana 1997, Erlangen 1999,
Nashville 2001, Novosibirsk 2003, Tokyo 2005, Brookhaven 2007, Ferrara 2009and now in St. Petersburg 2011 !
www.spin-community.org
The Spin Toolbox
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 25
Polarized Ion Sources
Optically-Pumped Polarized H- Ion Source at RHIC, Brookhaven
Nat.Lab.
RHIC OPPIS produces reliably 0.5-1.0mA(maximum 1.6 mA) polarized H- ion current.Pulse duration 400 s.Polarization at 200 MeV P = 85-90 %.
www.spin-community.org
The Spin Toolbox
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 26
Polarized Electron Sources
DANILAC Electron Injector, Darmstadt
www.spin-community.org
The Spin Toolbox
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 27
Polarized Solid TargetsCOMPASS
Polarized Target, CERN
www.spin-community.org
The Spin Toolbox
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 28
Polarized Gas Targets
ABS and Storage Cell Target with ANKE Spectrometer, COSY FZ Jülich
www.spin-community.org
The Spin Toolbox
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 29
Polarimeters
HERMES Compton Polarimeter (LPOL) for 27.5GeV Electrons stored in HERA DESY Hamburg
www.spin-community.org
The Spin Toolbox
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 30
Spin Theory
Decomposition of Nucleon Spin, discussed e.g. at recent Theory workshop ‘Transversity 2011’, or the upcoming workshop ‘DSPIN11’
www.spin-community.org
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 31
Future Workshops on Spin Tools• Topical vs. regular workshops • Is the division into different topics reasonable
(ion beams & targets, electron sources, solid targets, 3He, ...)?
• Do new ideas emerge from such workshops? • Do we have enough exchange with other
fields?
www.spin-community.org
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 32
Future Workshops on Spin Tools• Atomic beams
• Ion beams
• Open gas targets
• Closed/high pressure gas targets
• Solid polarized targets
• Photon beams
• Electron sources
• Polarimetry of- ion beams- electrons beams- recoils- decay particles- neutrons
• Applications in- medicine- material research- electronics- ......
www.spin-community.org
My Conclusions
E. Steffens FAU Erlangen-Nürnberg PSTP'11 Petersburg Sept.2011 33
Our workshops have an impressive history with many innovations for spin experiments
New initiatives needed in order to keep the field up and active
I look forward to a creative meeting in a stimulating atmosphere!