COOL2013 - Table of Session: TUPM1HA (Stochastic Cooling II & Future Facilities)

Paper

Title

Page

Study for Stochastic Cooling at Nuclotron, JINR

73

N. Shurkhno, A.O. Sidorin, G.V. Trubnikov
JINR, Dubna, Moscow Region, Russia
T. Katayama
GSI, Darmstadt, Germany
R. Stassen
FZJ, Jülich, Germany

The experiment on stochastic cooling at Nuclotron, initiated two years ago as a test bench for NICA collider, is progressing well. New scheme of cooling system, which includes ring-slot couplers as pick-up and kicker (designed at FZJ), optical notch-filter and full remote-controlled automation of measurements and adjustments, was set in operation in autumn 2012. This report presents results of beam cooling modeling, experimental measurements of the optical notch-filter and channel elements performed in 2011-2012, and also first results of the beam cooling achieved at Nuclotron in March 2013.

Slides TUPM1HA01 [1.817 MB]

TUPM1HA02

Potential of Stochastic Cooling of Heavy Ions in the LHC

76

M. Schaumann, J.M. Jowett
CERN, Geneva, Switzerland
M. Blaskiewicz
BNL, Upton, Long Island, New York, USA

The dynamics of the high intensity lead beams in the LHC are strongly influenced by intra-beam scattering (IBS), leading to significant emittance growth and particle losses at all energies. Particle losses during collisions are dominated by nuclear electromagnetic processes and the debunching effect arising from the influence of IBS, resulting in a non-exponential intensity decay during the fill and short luminosity lifetimes. In the LHC heavy ion runs 3 experiments will be taking data and the average fill duration will be rather short as a consequence of the high burn off rate. The achievements with stochastic cooling at RHIC suggest that such a system at LHC could substantially reduce the emittance growth and the debunching component during injection and collisions. The luminosity lifetime and fill length could be improved to optimize the use of the limited run time of 4 weeks per year. This paper discusses the first results of a feasibility study to use stochastic cooling on the lead ion beams in the LHC. The present and expected future performance without cooling is presented and compared to preliminary simulations estimating the improvements if stochastic cooling is applied.

Slides TUPM1HA02 [1.594 MB]

TUPM1HA03

High Intensity Heavy Ion Accelerator Facility (HIAF) in China

J.C. Yang, J.W. Xia, G.Q. Xiao
IMP, Lanzhou, People's Republic of China

HIAF (High Intensity heavy ion Accelerator Facility), a new facility planned in China for heavy ion related research, consists of two ion sources, a high intensity Heavy Ion Superconducting Linac (HISCL), a 45 Tm Accumulation and Booster Ring (ABR-45) and a multifunction storage ring system. The key features of HIAF are unprecedented high pulse beam intensity and versatile operation mode. The HIAF project aims to expand nuclear and related researches into presently unreachable region and give scientists possibility to conduct cutting-edge researches in these fields. The general description of the facility is given in this article with a focus on the accelerator design.

Slides TUPM1HA03 [4.534 MB]

Paper	Title	Page
TUPM1HA01	Study for Stochastic Cooling at Nuclotron, JINR	73
	N. Shurkhno, A.O. Sidorin, G.V. Trubnikov JINR, Dubna, Moscow Region, Russia T. Katayama GSI, Darmstadt, Germany R. Stassen FZJ, Jülich, Germany
	The experiment on stochastic cooling at Nuclotron, initiated two years ago as a test bench for NICA collider, is progressing well. New scheme of cooling system, which includes ring-slot couplers as pick-up and kicker (designed at FZJ), optical notch-filter and full remote-controlled automation of measurements and adjustments, was set in operation in autumn 2012. This report presents results of beam cooling modeling, experimental measurements of the optical notch-filter and channel elements performed in 2011-2012, and also first results of the beam cooling achieved at Nuclotron in March 2013.
	Slides TUPM1HA01 [1.817 MB]

TUPM1HA02	Potential of Stochastic Cooling of Heavy Ions in the LHC	76
	M. Schaumann, J.M. Jowett CERN, Geneva, Switzerland M. Blaskiewicz BNL, Upton, Long Island, New York, USA
	The dynamics of the high intensity lead beams in the LHC are strongly influenced by intra-beam scattering (IBS), leading to significant emittance growth and particle losses at all energies. Particle losses during collisions are dominated by nuclear electromagnetic processes and the debunching effect arising from the influence of IBS, resulting in a non-exponential intensity decay during the fill and short luminosity lifetimes. In the LHC heavy ion runs 3 experiments will be taking data and the average fill duration will be rather short as a consequence of the high burn off rate. The achievements with stochastic cooling at RHIC suggest that such a system at LHC could substantially reduce the emittance growth and the debunching component during injection and collisions. The luminosity lifetime and fill length could be improved to optimize the use of the limited run time of 4 weeks per year. This paper discusses the first results of a feasibility study to use stochastic cooling on the lead ion beams in the LHC. The present and expected future performance without cooling is presented and compared to preliminary simulations estimating the improvements if stochastic cooling is applied.
	Slides TUPM1HA02 [1.594 MB]

TUPM1HA03	High Intensity Heavy Ion Accelerator Facility (HIAF) in China
	J.C. Yang, J.W. Xia, G.Q. Xiao IMP, Lanzhou, People's Republic of China
	HIAF (High Intensity heavy ion Accelerator Facility), a new facility planned in China for heavy ion related research, consists of two ion sources, a high intensity Heavy Ion Superconducting Linac (HISCL), a 45 Tm Accumulation and Booster Ring (ABR-45) and a multifunction storage ring system. The key features of HIAF are unprecedented high pulse beam intensity and versatile operation mode. The HIAF project aims to expand nuclear and related researches into presently unreachable region and give scientists possibility to conduct cutting-edge researches in these fields. The general description of the facility is given in this article with a focus on the accelerator design.
	Slides TUPM1HA03 [4.534 MB]