PAC2013 - List of Authors (Aschenauer, E.C.)

Paper	Title	Page
TUPBA15	eRHIC Interaction Region and Lattice Design*	559
	D. Trbojevic, E.C. Aschenauer, Y.C. Jing, V. Litvinenko, Y. Luo, B. Parker, V. Ptitsyn BNL, Upton, Long Island, New York, USA
	Funding: Work performed under Contract Number DE-AC02-98CH10886 with the auspices of the US Department of Energy.∗ A proposal for the new high luminosity L=10³⁴ s^-1 cm^-2, polarized electron proton/3He and other un-polarized heavy ions eRHIC based on Electron Recovery Linacs (ERL), assumes a location in the existing tunnel of the operating Relativistic Heavy Ion Collider (RHIC). Requests of the experiments for the interaction region are very challenging: allow detection of neutrons, allow deep virtual scattering for protons-electron collisions, detection of partons with lower momentum, etc. We present an interaction region (IR) design with a vey high focusing where at the collision point IP of 5 cm, and a 10 mrad collision angle between electrons and ions using the crab cavities. We are introducing a combined function magnet for the first element in the high focusing triplet configuration to provide neutron and the lower energy parton detection, and allow at 4.5 cm distance passage of electrons through a no magnetic field region. The 200 T/m gradient quadrupoles provide very small beam size at the IP and allows a passage with a very small magnetic field for electrons.

Paper

Title

Page

eRHIC Interaction Region and Lattice Design*

559

D. Trbojevic, E.C. Aschenauer, Y.C. Jing, V. Litvinenko, Y. Luo, B. Parker, V. Ptitsyn
BNL, Upton, Long Island, New York, USA

Funding: Work performed under Contract Number DE-AC02-98CH10886 with the auspices of the US Department of Energy.∗
A proposal for the new high luminosity L=10³⁴ s^-1 cm^-2, polarized electron proton/3He and other un-polarized heavy ions eRHIC based on Electron Recovery Linacs (ERL), assumes a location in the existing tunnel of the operating Relativistic Heavy Ion Collider (RHIC). Requests of the experiments for the interaction region are very challenging: allow detection of neutrons, allow deep virtual scattering for protons-electron collisions, detection of partons with lower momentum, etc. We present an interaction region (IR) design with a vey high focusing where at the collision point IP of 5 cm, and a 10 mrad collision angle between electrons and ions using the crab cavities. We are introducing a combined function magnet for the first element in the high focusing triplet configuration to provide neutron and the lower energy parton detection, and allow at 4.5 cm distance passage of electrons through a no magnetic field region. The 200 T/m gradient quadrupoles provide very small beam size at the IP and allows a passage with a very small magnetic field for electrons.