2011 Particle Accelerator Conference - Classification: Sources and Medium Energy Accelerators / Accel/Storage Rings 20: Accelerators and Storage Rings (Other)

Paper

Title

Page

Design Studies of Pre-Boosters of Different Circumference for an Electron Ion Collider at JLab

1954

S. Abeyratne, B. Erdelyi
Northern Illinois University, DeKalb, Illinois, USA
S.L. Manikonda
ANL, Argonne, USA

The Medium-Energy Electron Ion Collider (MEIC) at JLab comprises a figure-8 shaped pre–booster ring as one of the main components. As it performs for both the accumulation of protons and ions it must have a circumference long enough to accommodate components such as RF cavities, cooling devices, collimation, injection and extraction. The length of the large booster ring in MEIC is suggested to be in the range 1.0-1.2km. Based on preliminary design work, the minimum viable length of the pre-booster in MEIC was identified as 200m. It is clear that the integer multiple of the length of the designed pre-booster should match with that of the large booster in MEIC. In order to cater future requirements of the EIC, the pre-booster in MEIC needs to be designed in different versions featured by different lengths. Thus, three different pre-boosters of lengths 200m, 250m and 300m are designed with various cell structures. This paper summarizes the three variants of the lattice.

FROAN2

DIANA, a Next Generation Deep Underground Accelerator Facility

2552

D. Leitner
NSCL, East Lansing, Michigan, USA
M. Couder, M. Wiescher
Notre Dame University, Notre Dame, Iowa, USA
A. Hodgkinson, A. Lemut, J.S. Saba
LBNL, Berkeley, California, USA
M. Leitner
FRIB, East Lansing, Michigan, USA

Funding: This work was supported by the National Science Foundation NSF-09-500 grant (DUSEL S4), Proposal ID 091728
DIANA (Dakota Ion Accelerators for Nuclear Astrophysics) is a next generation nuclear astrophysics accelerator facility proposed to be built as part of the US DUSEL (Deep Underground Science and Engineering Laboratory) project. The scientific goals of DIANA are focused on experiments related to nucleosynthesis processes. Reaction cross-sections at stellar temperature are extremely low, which makes these experiments challenging. Small signal rates are overwhelmed by large background rates associated with cosmic ray-induced reactions, background from natural radioactivity in the laboratory environment, and the beam-induced background on target impurities. By placing the DIANA facility deep underground (1.4 km) the cosmic ray induced background can be eliminated. In addition, the DIANA accelerator is being designed to achieve large laboratory reaction rates by delivering high ion beam currents (up to 100 mA) to a high density super-sonic jet-gas target (up to 10¹⁸ atoms/cm²). Two accelerators are coupled to enable measurements over a wide energy range from 30 keV to 3 MeVin a consistent manner. The accelerators design and its technical challenges are presented.

Slides FROAN2 [4.231 MB]

Paper	Title	Page
WEP251	Design Studies of Pre-Boosters of Different Circumference for an Electron Ion Collider at JLab	1954
	S. Abeyratne, B. Erdelyi Northern Illinois University, DeKalb, Illinois, USA S.L. Manikonda ANL, Argonne, USA
	The Medium-Energy Electron Ion Collider (MEIC) at JLab comprises a figure-8 shaped pre–booster ring as one of the main components. As it performs for both the accumulation of protons and ions it must have a circumference long enough to accommodate components such as RF cavities, cooling devices, collimation, injection and extraction. The length of the large booster ring in MEIC is suggested to be in the range 1.0-1.2km. Based on preliminary design work, the minimum viable length of the pre-booster in MEIC was identified as 200m. It is clear that the integer multiple of the length of the designed pre-booster should match with that of the large booster in MEIC. In order to cater future requirements of the EIC, the pre-booster in MEIC needs to be designed in different versions featured by different lengths. Thus, three different pre-boosters of lengths 200m, 250m and 300m are designed with various cell structures. This paper summarizes the three variants of the lattice.

FROAN2	DIANA, a Next Generation Deep Underground Accelerator Facility	2552
	D. Leitner NSCL, East Lansing, Michigan, USA M. Couder, M. Wiescher Notre Dame University, Notre Dame, Iowa, USA A. Hodgkinson, A. Lemut, J.S. Saba LBNL, Berkeley, California, USA M. Leitner FRIB, East Lansing, Michigan, USA
	Funding: This work was supported by the National Science Foundation NSF-09-500 grant (DUSEL S4), Proposal ID 091728 DIANA (Dakota Ion Accelerators for Nuclear Astrophysics) is a next generation nuclear astrophysics accelerator facility proposed to be built as part of the US DUSEL (Deep Underground Science and Engineering Laboratory) project. The scientific goals of DIANA are focused on experiments related to nucleosynthesis processes. Reaction cross-sections at stellar temperature are extremely low, which makes these experiments challenging. Small signal rates are overwhelmed by large background rates associated with cosmic ray-induced reactions, background from natural radioactivity in the laboratory environment, and the beam-induced background on target impurities. By placing the DIANA facility deep underground (1.4 km) the cosmic ray induced background can be eliminated. In addition, the DIANA accelerator is being designed to achieve large laboratory reaction rates by delivering high ion beam currents (up to 100 mA) to a high density super-sonic jet-gas target (up to 10¹⁸ atoms/cm²). Two accelerators are coupled to enable measurements over a wide energy range from 30 keV to 3 MeVin a consistent manner. The accelerators design and its technical challenges are presented.
	Slides FROAN2 [4.231 MB]