Report/Contribution to a conference proceedings

PUBDB-2016-02910

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Future Possibilities for HERA

Hoffstaetter, G. H. (Corresponding author)

2000
DESY Hamburg

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Please use a persistent id in citations: doi:10.3204/PUBDB-2016-02910

Report No.: DESY-M-00-04C

Abstract: During a shut down period of 9 months starting September 2000 two interaction regions of HERA will be upgraded. The interacting sizes of the electron and the proton beams will be reduced by moving superconducting quadrupoles into the detectors of H1 and ZEUS. To match the proton beam, the size of the electron beam will be further reduced by decreasing the horizontal electron emittance. These measures should increase the maximum luminosity from the current 2 · 10$^{31}$cm$^{−2}$s$^{−1}$ to 4.7 · 10$^{31}$cm$^{−2}$s$^{−1}$ . If in addition the design currents are reached, a luminosity of 7.6 · 10$^{31}$cm$^{−2}$s$^{−1}$ is expected. Spin rotators will be installed around the two collider experiments to deliver a longitudinally polarized electron beam. The technical components and concepts for handling the synchrotron radiation background in the detector region will be critical and the changes in the dynamics of the polarized electron beam have been analyzed. For the time after the program for collisions of protons with polarized electrons has come to an end several years after this luminosity upgrade, the high energy community has expressed strong interest in new physics at HERA. Three possible future concepts will be described. A) Storing light and heavy ions for collisions with polarized electrons in HERA. B) Accelerating and storing polarized protonsfor polarized e/p collisions in HERA. C) Accelerating and storing polarized deuterons in HERA for a simultaneous analysis of polarized e/p and polarized e/n collisions. Some of these concepts will only be feasible after installing an electron cooler in PETRA and/or HERA. The electronbeam for these collisions could come from HERA or possibly form TESLA.

Keyword(s): talk: Vienna 2000/06/26 ; electron p: storage ring ; luminosity: upgrade ; beam focusing: colliding beams ; quadrupole lens: superconductivity ; electron: polarized beam ; spin: rotator ; p: polarized beam ; deuteron: polarized beam ; ion: storage ring ; beam cooling: electron cooling ; DESY HERA Stor

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Contributing Institute(s):

1. M-Bereich (M(-2012))

Research Program(s):

1. No facility / HGF program None (POF1-890) (POF1-890)

Experiment(s):

1. No specific instrument

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Proceedings/Report Decking, W. (Corresponding author)DESY*
Contributions to the 7th European Particle Accelerator Conference EPAC 2000
2000The 7th European Particle Accelerator Conference EPAC 2000, EPAC 2000, ViennaVienna, Austria, 26 Jun 2000 - 30 Jun 20002000-06-262000-06-30 Hamburg : DESY (2000)2000     Fulltext BibTeX | EndNote: XML, Text | RIS

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