eRHIC: high energy electron-ion collider
General features
- Species: electrons collided with protons, 3He or heavy
ions (up to Au).
- Energy ranges:
- 3-20(30) GeV electrons
- 25-250 GeV polarized protons or up to 100 GeV/u gold ions
- Luminosities
- exceeding 1033 cm-2s-1 for e-p
collisions
- exceeding 1031 cm-2s-1 for
e-Au collisions
- At least 70% polarization degree of lepton, proton and 3He
beams.
- Longitudinal polarization in the collision point for both lepton
and proton beams.
Design features
- Based on superconducting energy recovery electron linac (ERL).
- Electron beam is used for collisions only on one pass.
- Multiple interaction points are possible.
- Electron polarization transparency in the whole energy range. No
depolarization
- IR design with head-on collisions and fast beam separation.
|
 |
Parameter Table
|
|
High energy setup |
Low energy setup |
|
p |
e |
p |
e |
|
Energy,
GeV |
250 |
10 |
50 |
3 |
|
Number of
bunches |
166 |
|
166 |
|
|
Bunch
spacing, ns |
71 |
71 |
71 |
71 |
|
Bunch intensity, 1011 |
2 |
1.2 |
2.0 |
1.2 |
|
Beam
current, mA |
420 |
260 |
420 |
260 |
|
95%
normalized emittance,  |
6 |
115 |
6 |
115 |
|
Rms emittance, nm |
3.8 |
1 |
19 |
3.3 |
|
beta*,
x/y, cm |
26 |
100 |
26 |
150 |
|
Beam-beam
parameters, x/y |
0.015 |
2.3 |
0.015 |
2.3 |
|
Rms bunch
length, cm |
20 |
1 |
20 |
1 |
|
Polarization, % |
70 |
80 |
70 |
80 |
|
Peak
Luminosity, 1.e33 cm-2s-1
Aver.Luminosity, 1.e33 cm-2s-1 |
2.6 |
0.53 |
|
0.87 |
0.18 |
|
Luminosity integral /week, pb-1 |
530 |
105 |
Back-up design option
Electrons (positrons) are stored in a storage ring.
See "eRHIC ZDR" for details.
Last Modified: August 31, 2009
Please forward all questions about this site to:
Vadim Ptitsyn
|
