2. Conference photo

3. Sponsorship Workshop was supported by International Committee for High Energy Spin Physics International Science and Technology Center Russian Foundation for Basic Research Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003

4. Contents Polarized Gas Target, ABS and LDS 10 talks Polarized Solid Targets 3 talks Polarized Electron Sources 5 talks Polarized Ion Sources 3 talks Polarimetry 5 talks Photocathods 9 talks ISTC special session 4 talks Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003

5. Polarized Gas Target, ABS and LDS Frank Rathmann (COSY) Polarized Gas Targets. Eugeny Tsentalovich (MIT) The BLAST Polarized H/D Target Paolo Lenisa (INFN-Ferrara) The HERMES Transversely Polarized Hydrogen Target Werner Heil (IP,Mainz) Polarized 3He Targets Tomohiro Uesaka (CNS,Tokyo) Polarized 3He Target for the Polarization Correlation Experiment at NUCLOTRON. Hans Beijers (KVI) RF-Induced spin Transitions in Polarized Atomic Beam Sources. Dmitri Toporkov (BINP) Analysis of the Beam Intensity from ABS. Benjamin Clasie (MIT) Laser Driven Polarized H/D Sources and Targets Yuri Shestakov (BINP) High Density Polarized Deuterium Gas Target for the VEPP-3 Electron Storage Ring Anatoly Zelenski (BNL) H-Jet Polarimeter for RHIC Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003

6. Polarized Gas Target, ABS and LDS HERA, Bates,NIKHEF COSY, IUCF, RHIC HESR Gas Targets: - thin - isotopically pure - polarized Storage Rings: - high stored currents - low background Presently achievable Luminosities L  10 29 – 10 32 cm -2 s -1 (protons) (electrons) BINP Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003 p d p e e + e Frank Rathmann (COSY) Polarized Gas Targets.

7. Polarized Gas Target, ABS and LDS Although operated since only about 10-15 years, Polarized Gas Targets have been very successful in obtaining high quality data: – IUCF ● pp elastic ● pp  pp  0, pp  pn  + ● pd elastic – EDDA ● pp elastic 500 – 2500 MeV ● TRI test at COSY – VEPP-3, AmPS ● T 20 measurements in ed reactions – HERMES at HERA ● employed 3 He, H and D target in DIS Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003

8. Polarized Gas Target, ABS and LDS HERA e +/- ring: 45 mA 27.5 GeV P  55 % HERMES spectrometer Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003 Paolo Lenisa (INFN-Ferrara) The HERMES Transversely Polarized Hydrogen Target

9. Polarized Gas Target, ABS and LDS –Smooth running conditions –Small amount of recombination (  2%) –Small effect of beam induced depolarization (<1%) Target performance in 2002/2003 H transversely polarized target running @ HERMES and  resonances under control Additional coils installed for the present run Target polarization in 2002/03 P t = 0.741 P t = 0.741  0.061, density = 1.1x10 14 nucl/cm 2 Relative factor of merit P 2 t  0.6x10 14 Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003

10. Polarized Gas Target, ABS and LDS Flux of polarized deuterium atoms injected into the cell at/sec. Magnetic poletip field of superconducting magnets up to 4.8 T P zz =0.4, target thickness viewed by the detector 8x10 13 at/cm 2 13x14x400 mm Inner diam. 44 mm Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003 Yuri Shestakov (BINP) High Density Polarized Deuterium Gas Target for the VEPP-3 Electron Storage Ring

11. Polarized Gas Target, ABS and LDS Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003 New pumps and pipes with larger conductivity improved vacuum conditions in the top chambers significantly. The ABS intensity increased by 30-40%. Installation of SFT/WFT unit reduced ABS intensity by about 30 %. Now vacuum conditions in the bottom sextupole chamber are becoming the dominating factor in atomic beam attenuation. ABS in BLAST magnetic field (~2 kGs) BLAST magnetic field reduces ABS intensity by factor of 2. New sextupoles will be enclosed in shielding cases. Temporary shields have been installed on three out of four magnets in the upper sextupole unit. Even these shields reduced the intensity attenuation caused be BLAST magnetic shield from factor of 2 down to 15 %. Eugeny Tsentalovich (MIT) The BLAST Polarized H/D Target

12. Polarized Gas Target, ABS and LDS Flux of polarized hydrogen atoms per second Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003 Anatoly Zelenski (BNL) H-Jet Polarimeter for RHIC

13. Polarized Gas Target, ABS and LDS Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003 Hermes (ABS) Novosibirsk ( ABS ) ( Tensor polarization P ZZ ) Gas HD D F 6.54.6 8.2 (10 16 atoms/s) T 7.514 8 (10 13 cm -2 ) f  0.930.95 p z,atomic 0.920.89 F(f  p z,at ) 2 0.48 0.32 0.13 – 0.52 (10 17 atoms/s) t(f  p z,at ) 2 5.510.0 1.3 – 5.1 (10 13 cm -2 ) Argonne (LDS) IUCF (LDT) MIT (LDT) 1995 1998 Preliminary (units) Gas HD HD H F 1.7 0.86 1.01.0 1.1 ( 10 18 atoms/s ) t 0.30.4 1.5 ( 10 15 cm -2 ) f  0.750.75 0.480.48 0.56 p z,atomic 0.510.42 0.37 p z,total 0.1450.102 F(f  p z,at ) 2 2.51.1 0.320.15 0.47 ( 10 17 atoms/s ) t(f  p z,at ) 2 0.930.61 6.4 ( 10 13 cm -2 ) Benjamin Clasie (MIT) Laser Driven Polarized H/D Sources and Targets

14. Polarized Gas Target, ABS and LDS Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003 1m Tomohiro Uesaka (CNS,Tokyo) Polarized 3He Target for the Polarization Correlation Experiment at NUCLOTRON.

15. Polarized Solid Targets Patric Hautle (PSI) Polarized Solid Targets Michio Hatano (RIKEN) Design and Performance of the Polarized Solid Proton Target for the RI Beam Experiments Andrey Dudnikov (BINP) Spin Isomeres and Ferromagnetic Particles in MR Tomography Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003

16. Polarized Solid Targets Polarised Solid Targets in use Plethora of GDH Experiments on Photon Beams USA (JLab, SLAC, TUNL, LEGS, GRAAL) Germany (MAMI, ELSA) Japan (SPring-8) Gluon Polarisation Measurements CERN (COMPASS) SLAC (E161) Others n-d scattering length (PSI) „DNP Dynamics“ (PSI, ILL) RI Beams (Japan)..... Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003 Patric Hautle (PSI) Polarized Solid Targets

17. Polarized Solid Targets Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003 Michio Hatano (RIKEN) Design and Performance of the Polarized Solid Proton Target for the RI Beam Experiments

18. Polarized Electron Sources Eugeny Tsentalovich (MIT) Polarized Electron Source at the MIT-Bates Klaus Shroeter (MPI NP) Status of the Pulsed Electron Source for Atomic Collision Experiments Eugeny Konstantinov (BINP) Project of Polarized Electrons Source Based on GaAs Cathode S-band RF Photogun Alexander Potylitsyn (TPU) Separation of Spin States in Unpolarized Positron Beam Interacting With Circularly Polarized Laser Photons Yury Shatunov (BINP) Electron-Ion Collisions at RHIC Using a High Intensity Self- Polarizing Electron Ring Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003

19. Polarized Electron Sources Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003 Eugeny Tsentalovich (MIT) Polarized Electron Source at the MIT-Bates Requirements

20. Polarized Electron Sources Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003 The superbend control of polarization time. 8-15min polarization time is achievable. Superbend magnet Yury Shatunov (BINP) Electron-Ion Collisions at RHIC Using a High Intensity Self-Polarizing Electron Ring

21. Polarized Ion Sources Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003 Anatoly Zelenski (BNL) Polarized Ion Sources Ralf Hertenberger ( Univ. of Munich) A High Brightness Source for Polarized and Unpolarized Negative Hydrogen Beams Ralf Gebel (Julich) Polarized D- Beams at COSY/Julich

22. Polarized Ion Sources Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003 Ralf Gebel (Julich) Polarized D- Beams at COSY/Julich P z =0.914+-0.022 new record for polarization for proton beam P z =0.764+-0.036 vector polarization for deuteron beam

23. Polarized Ion Sources Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003 Ralf Hertenberger (Univ. of Munich) A High Brightness Source for Polarized and Unpolarized Negative Hydrogen Beams

24. Polarimetry Maxim Dyug (BINP) Deuteron Target Polarimeter at VEPP-3 Storage Ring Victor Zhilich (BINP) Moeller Polarimeter for VEPP-3 Storage Ring Based on Internal Polarized Jet Ivan Nikolaev (BINP) Tuschek Polarimeter for Circulating Electron Beams Rob Kremers (KVI) Design and Measurements With the New Lamb-Shift Polarimeter at KVI Ralf Engels (Forschungszentrum Julich) Nuclear Polarization Measurement of H/D Atoms Extracted from a Storage Cell with a Lamb-shift Polarimeter Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003

25. Polarimetry LQP Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003 Maxim Dyug (BINP) Deuteron Target Polarimeter at VEPP-3 Storage Ring

26. Polarimetry Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003 Victor Zhilich (BINP) Moeller Polarimeter for VEPP-3 Storage Ring Based on Internal Polarized Jet

27. Polarimetry Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003 Due to the location near the source 1)Easy investigation of source parameters. 2) Fast production of highly optimized polarized beam. 3) Depolarization studies possible of the accelerator facility. Due to the principle 4)Atomic cross sections guarantee high accuracy. Goal : A polarimeter measuring in 30 sec a polarization degree with accuracies of 1%. Pz = -0.912 +/- 0.009 Pzz = -1.751 +/- 0.002 Pz = -0.006 = +/- 0.05 Rob Kremers (KVI) Design and Measurements With the New Lamb-Shift Polarimeter at KVI

28. Polarimetry Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003 Nuclear polarization of an extracted atomic beam can be determined with high precision of about 0.5% within 20 seconds P z =0.89 +-0.01 P z =0.01+-0.01 P zz =0.89+-0.01 Ralf Engels (Forschungszentrum Julich) Nuclear Polarization Measurement of H/D Atoms Extracted from a Storage Cell Target of ANKE with a Lamb-shift Polarimeter

29. Photocathods Yuri Mamaev (SPSPU) Search of Optimal Structure of Photocathode for PES Oleg Tereshenko (IPS) GaN-(Cs,O) Photocathode For Polarized Electron Source Dmitry Orlov (MPI NP) Cold Electron Beams From a GaAs-Photocathode. Svetlana Kulkova (ISPMS) Simulation of Na, K, Cs and Cs(O) Adsorption on GaAs (110) and (100) Surfaces: Towards Predictable Electronic Structure of Activation Layer James Clendenin (SLAC) Status of DULY/SLAC Polarized RF Gun Project Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003

30. Photocathods Sergey Starovojtov (SPSPU) Improvement of Strained GaAsP Photocathodes The technique of improvement of Ga-As-P photocathodes in application for laser systems of accelerator was considered. Vitaly Alperovich (IPS) Polarized Cathodoluminescence in p-GaAs(Cs,O) Induced by Very Low Energy Spin-Polarized Electrons The problem of cathodoluminescence in Ga-As based photocathodes induced by spin-polarized electrons of low energy was discussed. Alexander Terekhov (IPS) Refraction and Subthermal Transverse Energy of Electrons Emitted from GaAs-(Cs,O) The problem of refraction and subthermal transverse energy of electrons emitted from GaAs-(Cs,O) photocathodes. Also the dependence of the angle distributions of electrons on their spin states was considered. James Clendenin (SLAC) Recent Progress at SLAC Extracting High Charge From Highly-Polarized Photocathodes for Future-Collider Applications. The progress in high pulsed current and high polarization degree photocathodes was regarded. The matter is valuable in future colliders application. Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003

31. Photocathods Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003 Yuri Mamaev (SPSPU) Search of Optimal Structure of Photocathode for PES AcceleratorP, %Beam MAMI80-85QE > 1% ELSA> 80 6*10 11 el/1  s pulse MIT-Bates>80 peak current of up to 12mA JLC>90 2*10 10 el/1 ns pulse TJNAF>80

32. Photocathods Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003 Yuri Mamaev (SPSPU) Search of Optimal Structure of Photocathode for PES High gradient doped strained superlattices InAlGaAs/AlGaAs and GaAs/GaAsP are being developed. SCL has been overcame. GaAs/GaAsP gave peak polarization of 85% with ~1% QE and no charge saturation up to 1  10 12 e- in 60 ns. JLC and SLAC sources are planned to operate with GaAsP strained superlattices.

33. Photocathods Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003 Until now the best structures are Strained GaAsP with GaAs quantum well. Strained InAlGaAs/AlGaAs and GaAs/GaAsP superlattices. The optimization of InAlGaAs/GaAsP strain- compensated superlattices is underway. NEA activation process is of crucial importance. Yuri Mamaev (SPSPU) Search of Optimal Structure of Photocathode for PES

34. ISTC special session Yury Shatunov (BINP) (grant ISTC 1928) Construction of VEPP-2000 Electron-Positron Storage Ring Alexander Ivanov (BINP) (grant ISTC 2569) Accelerator Based Neutron Source for Boron Neutron Capture Therapeutics. Vladimir Tarnetsky (BINP) (grant ISTC 2550) High Power Electron Accelerator Frank Rathmann (COSY) (grant ISTC 1861) Measurements of the Polarization in H2 and D2 Molecules Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003

35. The Proceedings of PST2003 will be published as a special issue of Nuclear Instruments and Methods in Physics Research A. Dmitri Toporkov Summary of the 10 th Workshop on SPIN2004 Polarized Sources and Targets PST2003