IPAC2011 - List of Keywords (secondary-beams)

Paper	Title	Other Keywords	Page
TUPC099	New Measurements of Proton Beam Extinction at J-PARC	proton, injection, linac, vacuum	1242
	K. Yoshimura, Y. Hori, Y. Igarashi, S. Mihara, H. Nishiguchi, Y. Sato, M. Shimamoto, Y. Takeda, M. Uota KEK, Ibaraki, Japan M. Aoki, S. Hikida, H. Nakai Osaka University, Osaka, Japan Y. Hashimoto J-PARC, KEK & JAEA, Ibaraki-ken, Japan
	Proton beam extinction, defined as a residual to primary ratio of beam intensity, is one of the most important parameters to realize the future muon electron conversion experiment (COMET) proposed at J-PARC. To achieve the required extinction level of 10^-9, we started measuring extinction at main ring (MR) as its first step. According to the various measurements done at the different positions, empty RF buckets of RCS, which were considered to be swept away by the RF chopper, contained about 10^-7 ~ 10^-5 of the main beam pulse due to chopper inefficiency. We have developed a new beam monitor with improved performance for further studies at the abort line. In addition, we have started new measurements at the Hadron experimental hall by using slow-extracted beam. In this paper, we present recent results and future prospect of beam extinction measurements.

THPS051	Development of Fragmented Low-Z Ion Beams for the NA61 Fixed-target Experiment at the CERN SPS	ion, target, light-ion, injection	3541
	I. Efthymiopoulos, O.E. Berrig, T. Bohl, H. Breuker, M. Calviani, S. Cettour-Cave, K. Cornelis, D. Manglunki, S. Mataguez, S. Maury, J. Spanggaard, C. Valderanis CERN, Geneva, Switzerland Z. Fodor KFKI, Budapest, Hungary M. Gazdzicki IKF, Frankfurt-am-Main, Germany F. Gouber, A. Ivashkin RAS/INR, Moscow, Russia P. Seyboth MPI-P, München, Germany H. Stroebele IAP, Frankfurt am Main, Germany
	The NA61 experiment, aims to study the properties of the onset of deconfinement at low SPS energies and to find signatures of the critical point of strongly interacting matter. A broad range in T-μ_B phase diagram will be covered by performing an energy (13A-158A GeV/c) and system size (p+p, Be+Be, Ar+Ca, Xe+La) scan. In a first phase, fragmented ion beams of 7Be or 11C produced as secondaries with the same momentum per nucleon when the incident primary Pb-ion beam hits a thin Be target will be used. The H2 beam line that transports the beam to the experiment acts as a double spectrometer which combined with a new thin target (degrader) where fragments loose energy proportional to the square of their charge allows the separation of the wanted A/Z fragments. Thin scintillators and TOF measurement for the low energy points are used as particle identification devices. In this paper results from the first test of the fragmented ion beam done in 2010 will be presented showing that a pure Be beam can be obtained satisfying the needs of the experiment.

Paper

Title

Other Keywords

Page

TUPC099

New Measurements of Proton Beam Extinction at J-PARC

proton, injection, linac, vacuum

1242

K. Yoshimura, Y. Hori, Y. Igarashi, S. Mihara, H. Nishiguchi, Y. Sato, M. Shimamoto, Y. Takeda, M. Uota
KEK, Ibaraki, Japan
M. Aoki, S. Hikida, H. Nakai
Osaka University, Osaka, Japan
Y. Hashimoto
J-PARC, KEK & JAEA, Ibaraki-ken, Japan

Proton beam extinction, defined as a residual to primary ratio of beam intensity, is one of the most important parameters to realize the future muon electron conversion experiment (COMET) proposed at J-PARC. To achieve the required extinction level of 10^-9, we started measuring extinction at main ring (MR) as its first step. According to the various measurements done at the different positions, empty RF buckets of RCS, which were considered to be swept away by the RF chopper, contained about 10^-7 ~ 10^-5 of the main beam pulse due to chopper inefficiency. We have developed a new beam monitor with improved performance for further studies at the abort line. In addition, we have started new measurements at the Hadron experimental hall by using slow-extracted beam. In this paper, we present recent results and future prospect of beam extinction measurements.

THPS051

Development of Fragmented Low-Z Ion Beams for the NA61 Fixed-target Experiment at the CERN SPS

ion, target, light-ion, injection

3541

I. Efthymiopoulos, O.E. Berrig, T. Bohl, H. Breuker, M. Calviani, S. Cettour-Cave, K. Cornelis, D. Manglunki, S. Mataguez, S. Maury, J. Spanggaard, C. Valderanis
CERN, Geneva, Switzerland
Z. Fodor
KFKI, Budapest, Hungary
M. Gazdzicki
IKF, Frankfurt-am-Main, Germany
F. Gouber, A. Ivashkin
RAS/INR, Moscow, Russia
P. Seyboth
MPI-P, München, Germany
H. Stroebele
IAP, Frankfurt am Main, Germany

The NA61 experiment, aims to study the properties of the onset of deconfinement at low SPS energies and to find signatures of the critical point of strongly interacting matter. A broad range in T-μ_B phase diagram will be covered by performing an energy (13A-158A GeV/c) and system size (p+p, Be+Be, Ar+Ca, Xe+La) scan. In a first phase, fragmented ion beams of 7Be or 11C produced as secondaries with the same momentum per nucleon when the incident primary Pb-ion beam hits a thin Be target will be used. The H2 beam line that transports the beam to the experiment acts as a double spectrometer which combined with a new thin target (degrader) where fragments loose energy proportional to the square of their charge allows the separation of the wanted A/Z fragments. Thin scintillators and TOF measurement for the low energy points are used as particle identification devices. In this paper results from the first test of the fragmented ion beam done in 2010 will be presented showing that a pure Be beam can be obtained satisfying the needs of the experiment.