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Title: The Polarized Internal Target at ANKE: First Results

Abstract

For future few-nucleon interactions studies with polarized beams and targets at COSY-Juelich, a polarized internal storage cell gas target was implemented at the magnetic spectrometer ANKE in summer 2005. First commissioning of the polarized Atomic Beam Source (ABS) at ANKE was carried out and some improvements of the system have been done. At the same time, storage-cell tests to determine the COSY beam dimensions have been performed. In February 2005, a first storage cell prototype was implemented. It was made from an aluminum foil covered by a special PTFE suspension. In November 2005, tests were carried out with a storage cell using a polarized hydrogen beam from the ABS, electron cooling and stacking injection of the COSY beam at different deflection angles of the ANKE spectrometer magnet. An average target polarization of P=0.44{+-}0.03 (November 2005 beamtime) was measured, while we expected about P=0.51-0.55 due to the availability of rf-transition units in the ABS. The jet target thickness was measured as (1.5{+-}0.1){center_dot}1011 atoms/cm2. In March 2006, measurements with unpolarized protons at T=831 MeV and an unpolarized H2 beam injected from a gas feeding system into the aluminum storage cell were carried out. The analysis of the pp {yields} pp{pi}0 and ppmore » {yields} pn{pi}+ reactions showed that events from the extended target can be clearly identified in the ANKE forward detector system.« less

Authors:
;  [1]; ; ; ; ; ; ;  [2];  [3]; ;  [1]
  1. Petersburg Nuclear Physic Institute, Gatchina (Russian Federation)
  2. Institut fuer Kernphysik, Forschungszentrum Juelich (Germany)
  3. Zentralabteilung Technologie, Forschungszentrum Juelich (Germany)
Publication Date:
OSTI Identifier:
21064079
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 915; Journal Issue: 1; Conference: 17. international spin physics symposium, Kyoto (Japan), 2-7 Oct 2006; Other Information: DOI: 10.1063/1.2750938; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA). ANKE Collaboration; Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ATOMIC BEAM SOURCES; ATOMIC BEAMS; BEAM INJECTION; BEAM MONITORING; COMMISSIONING; COSY STORAGE RING; ELECTRON COOLING; FOILS; JETS; MAGNETIC SPECTROMETERS; MEV RANGE; POLARIZATION; POLARIZED BEAMS; POLARIZED TARGETS; PROTONS

Citation Formats

Grigoryev, K, Mikirtytchiants, M, Institut fuer Kernphysik, Forschungszentrum Juelich, Engels, R, Lorentz, B, Prasuhn, D, Rathmann, F, Sarkadi, J, Seyfarth, H, Stroeher, H, Klehr, F, Mikirtytchiants, S, and Vasilyev, A. The Polarized Internal Target at ANKE: First Results. United States: N. p., 2007. Web. doi:10.1063/1.2750938.
Grigoryev, K, Mikirtytchiants, M, Institut fuer Kernphysik, Forschungszentrum Juelich, Engels, R, Lorentz, B, Prasuhn, D, Rathmann, F, Sarkadi, J, Seyfarth, H, Stroeher, H, Klehr, F, Mikirtytchiants, S, & Vasilyev, A. The Polarized Internal Target at ANKE: First Results. United States. https://doi.org/10.1063/1.2750938
Grigoryev, K, Mikirtytchiants, M, Institut fuer Kernphysik, Forschungszentrum Juelich, Engels, R, Lorentz, B, Prasuhn, D, Rathmann, F, Sarkadi, J, Seyfarth, H, Stroeher, H, Klehr, F, Mikirtytchiants, S, and Vasilyev, A. 2007. "The Polarized Internal Target at ANKE: First Results". United States. https://doi.org/10.1063/1.2750938.
@article{osti_21064079,
title = {The Polarized Internal Target at ANKE: First Results},
author = {Grigoryev, K and Mikirtytchiants, M and Institut fuer Kernphysik, Forschungszentrum Juelich and Engels, R and Lorentz, B and Prasuhn, D and Rathmann, F and Sarkadi, J and Seyfarth, H and Stroeher, H and Klehr, F and Mikirtytchiants, S and Vasilyev, A},
abstractNote = {For future few-nucleon interactions studies with polarized beams and targets at COSY-Juelich, a polarized internal storage cell gas target was implemented at the magnetic spectrometer ANKE in summer 2005. First commissioning of the polarized Atomic Beam Source (ABS) at ANKE was carried out and some improvements of the system have been done. At the same time, storage-cell tests to determine the COSY beam dimensions have been performed. In February 2005, a first storage cell prototype was implemented. It was made from an aluminum foil covered by a special PTFE suspension. In November 2005, tests were carried out with a storage cell using a polarized hydrogen beam from the ABS, electron cooling and stacking injection of the COSY beam at different deflection angles of the ANKE spectrometer magnet. An average target polarization of P=0.44{+-}0.03 (November 2005 beamtime) was measured, while we expected about P=0.51-0.55 due to the availability of rf-transition units in the ABS. The jet target thickness was measured as (1.5{+-}0.1){center_dot}1011 atoms/cm2. In March 2006, measurements with unpolarized protons at T=831 MeV and an unpolarized H2 beam injected from a gas feeding system into the aluminum storage cell were carried out. The analysis of the pp {yields} pp{pi}0 and pp {yields} pn{pi}+ reactions showed that events from the extended target can be clearly identified in the ANKE forward detector system.},
doi = {10.1063/1.2750938},
url = {https://www.osti.gov/biblio/21064079}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 915,
place = {United States},
year = {Wed Jun 13 00:00:00 EDT 2007},
month = {Wed Jun 13 00:00:00 EDT 2007}
}