10 MeV Test Cave option 1

1
10 MeV _at_ Test Cave (option 1)
100/350 keV
10 MeV
1 mA 10MeV
¼ Cryo
Diagnostics Spectrometer, Mott, FC,
Photo-Cathode Gun
Buncher Warm cavity
2
10 MeV _at_ Test Cave (option 2)
10 MeV
100/350 keV
1 mA 10MeV
Small Chicane
¼ Cryo
Diagnostics Spectrometer, Mott, FC,
Photo-Cathode Gun
Buncher Warm cavity
3
10 MeV _at_ Test Cave (option 2)
100/350 keV
10 MeV
Dump
1 mA 10MeV
H
C
C
C
C
C
C
H
V
V
V
A
B
B
H
Small Chicane
B
¼ Cryo
V
Diagnostics Spectrometer, Mott, FC,
Photo-Cathode Gun
Buncher Warm cavity
4
An example
Assume Chicane angle 15 deg D125 cm D230
cm D330 cm
Gun
1/4
D1
D2
D3
5
Bunchlength and E spread _at_ 1/4 (no space charge)
Angle15 deg
Gun
1/4
25
30
30 cm
6
¼ Cryo modifications

• For SRF cavities to accept low energy beam
  (100-200
• keV) the following modifications are needed
• 1) We need to design the First few cells for b lt
  1.
• (beta-graded cells)
• 2) We need to lower the power to the first few
  cells. (The leakage RF field from the first cell
  can destroy the low energy beam)

7
¼ Cryo modifications Possibilities

• Possible solution for accelerating a low energy
  beam in
• the SRF cavities
• Modify the cells of the first cavity to have
  smaller gaps and less voltage across the gaps
• Add a cavity at the beginning with a shorter gap
  and independent RF controls
• ?