IPAC2012 - List of Authors (Sievers, P.)

Paper	Title	Page
WEPPD030	Concept for the Antiproton Production Target at FAIR	2570
	K. Knie, B. Franzke, V. Gostishchev, M. Steck GSI, Darmstadt, Germany P. Sievers CERN, Geneva, Switzerland
	We will report on the status of the antiproton production target for the FAIR facility. A Ni target will be bombarded by a pulsed beam of 29 GeV protons with an intensity of 2.5·10¹³ ppp and a repetition rate of 0.2 Hz. Directly after the target the antiprotons will be focussed by a magnetic horn. In the proceeding magnetic separator antiprotons with an energy of 3 GeV (± 3%) will be selected and transported to the antiproton collector ring. The planned setup of the target area, including radiation protection issues, will be presented,

WEPPR076	Positron Options for the Linac-ring LHeC	3108
	F. Zimmermann, O.S. Brüning, Y. Papaphilippou, D. Schulte, P. Sievers CERN, Geneva, Switzerland H.-H. Braun Paul Scherrer Institut, Villigen, Switzerland E.V. Bulyak NSC/KIPT, Kharkov, Ukraine M. Klein The University of Liverpool, Liverpool, United Kingdom L. Rinolfi JUAS, Archamps, France A. Variola, Z.F. Zomer LAL, Orsay, France V. Yakimenko BNL, Upton, Long Island, New York, USA
	The full physics program of a future Large Hadron electron Collider (LHeC) requires both pe⁺ and pe- collisions. For a pulsed 140-GeV or an ERL-based 60-GeV Linac-Ring LHeC this implies a challenging rate of, respectively, about 1.8·10¹⁵ or 4.4·10¹⁶ e+/s at the collision point, which is about 300 or 7000 times the past SLC rate. We consider providing this e⁺ rate through a combination of measures: (1) Reducing the required production rate from the e⁺ target through colliding e⁺ (and the LHC protons) several times before deceleration, by reusing the e⁺ over several acceleration/deceleration cycles, and by cooling them, e.g., with a compact tri-ring scheme or a conventional damping ring in the SPS tunnel. (2) Using an advanced target, e.g., W-granules, rotating wheel, sliced-rod converter, or liquid metal jet, for converting gamma rays to e+. (3) Selecting the most powerful of several proposed gamma sources, namely Compton ERL, Compton storage ring, coherent pair production in a strong laser, or high-field undulator radiation from the high-energy lepton beam. We describe the various concepts, present example parameters, estimate the electrical power required, and mention open questions.

Paper

Title

Page

Concept for the Antiproton Production Target at FAIR

2570

K. Knie, B. Franzke, V. Gostishchev, M. Steck
GSI, Darmstadt, Germany
P. Sievers
CERN, Geneva, Switzerland

We will report on the status of the antiproton production target for the FAIR facility. A Ni target will be bombarded by a pulsed beam of 29 GeV protons with an intensity of 2.5·10¹³ ppp and a repetition rate of 0.2 Hz. Directly after the target the antiprotons will be focussed by a magnetic horn. In the proceeding magnetic separator antiprotons with an energy of 3 GeV (± 3%) will be selected and transported to the antiproton collector ring. The planned setup of the target area, including radiation protection issues, will be presented,

WEPPR076

Positron Options for the Linac-ring LHeC

3108

F. Zimmermann, O.S. Brüning, Y. Papaphilippou, D. Schulte, P. Sievers
CERN, Geneva, Switzerland
H.-H. Braun
Paul Scherrer Institut, Villigen, Switzerland
E.V. Bulyak
NSC/KIPT, Kharkov, Ukraine
M. Klein
The University of Liverpool, Liverpool, United Kingdom
L. Rinolfi
JUAS, Archamps, France
A. Variola, Z.F. Zomer
LAL, Orsay, France
V. Yakimenko
BNL, Upton, Long Island, New York, USA

The full physics program of a future Large Hadron electron Collider (LHeC) requires both pe⁺ and pe- collisions. For a pulsed 140-GeV or an ERL-based 60-GeV Linac-Ring LHeC this implies a challenging rate of, respectively, about 1.8·10¹⁵ or 4.4·10¹⁶ e+/s at the collision point, which is about 300 or 7000 times the past SLC rate. We consider providing this e⁺ rate through a combination of measures: (1) Reducing the required production rate from the e⁺ target through colliding e⁺ (and the LHC protons) several times before deceleration, by reusing the e⁺ over several acceleration/deceleration cycles, and by cooling them, e.g., with a compact tri-ring scheme or a conventional damping ring in the SPS tunnel. (2) Using an advanced target, e.g., W-granules, rotating wheel, sliced-rod converter, or liquid metal jet, for converting gamma rays to e+. (3) Selecting the most powerful of several proposed gamma sources, namely Compton ERL, Compton storage ring, coherent pair production in a strong laser, or high-field undulator radiation from the high-energy lepton beam. We describe the various concepts, present example parameters, estimate the electrical power required, and mention open questions.