> Working Group 1 - Injectors
Working Group Convenor: Andrew Burrill aburrill@bnl.gov
Co-Convenor: Matt Poelker poelker@jlab.org
Program Committee Contacts: C. Hernandez-Garcia, S. Benson, G. Neil, D. Douglas (JLab), I. Bazarov, B. Dunham (Cornell University), T. Rao, Ilan Ben-Zvi (BNL), J. Lewellen (ANL)
Working Group Charge
We define Injection as the part of the ERL up to, and including, the merge with the returning high-energy beam and assume guns must provide CW beam at high current.
Gun Technology: DC, NCRF, SCRF, hybrids
- Status reports from each gun program (JLab, Cornell, BNL/AES, Daresbury, Rossendorf, LANL, Peking hybrid gun, BINP, …)
- Update the gun table: advantages, disadvantages, state-of-the-art, milestones since ERL05, expected required level of continued R&D, etc
- Technological challenges: vacuum, field emission, load locked designs, photocathode cooling, HV breakdown, beam management, photocathode degradation, cathode adverse effects on RF cavity,…
Photocathodes and Lasers:
- Update photocathode table: pros/cons, identify appropriate laser wavelength, IR vs Green vs UV, measured QE, necessary laser power for 100mA beam, response time,
- List drive laser candidates for each photocathode: max available power, approx. cost and complexity, pulse forming mechanism, pulsewidth, etc
Beam Dynamics, emittance preservation techniques
- Laser pulse shaping techniques
- bunch compression techniques
- RF focusing
- Graded beta cavities
- Identify the biggest challenges…
Injector Designs, benchmarking codes
- List the computational methods used for each major design effort (ANL APS, JLab FEL, BNL ERL, BINP, Cornell,…)
- List advantages/disadvantages of each code (superfish, parmela, astra, track, egun, microwave studio, mafia, …). How many versions of each code?
- Status of efforts to benchmark codes
Working Group Sessions (DRAFT)
Session 1 - DC Guns (Tue 09:00 - 13:00)
| Time |
Title |
Presenter |
| 09:00 (25+5q) |
Cornell ERL Injector Status |
Bruce Dunham
  |
| 09:30 (25+5q) |
Status of JLab-FEL DC High Voltage GaAs Photogun |
Carlos Hernandez Garcia
|
| 10:00 (25+5q) |
Injection system of 4GLS |
Boris Militsyn
|
| 10:30 - 11:00 |
Coffee |
|
| 11:00 (25+5q) |
Development of an electron gun for the ERL light source in Japan |
N. Nishimore
|
| 11:30 (25 +5q) |
Status of 100kV DC High Voltage Polarized Electrons Guns at CEBAF |
Matt Poelker
|
| until 12:30 |
Group Discussion: DC gun issues |
All |
Session 2 - NCRF Guns (Tue 14:00 - 17:30)
| Time |
Title |
Presenter |
| 14:00 (25 +5q) |
Schottky enabled photoemission in RF guns |
Manoel Conde
|
| 14:30 (25+5q) |
Operation of the FLASH injector |
Jang-Hui Han
|
| 15:00 (25+5q) |
Development of a High Brightness VHF Electron Source at LBNL |
Steve Lidia
|
| 15:30 - 16:00 |
Coffee |
|
| untill 17:30 |
Group discussion on NCRF gun issues |
All |
Session 3 - (Joint WG1/WG2) - Computational Aspects (Wed 09:00 - 13:00)
| Time |
Title |
Presenter |
| 09:00 (25 +5q) |
Emittance evolution far from invariant envelope in photoinjectors |
Chun-Xi Wang
|
| 09:30 (25 +5q) |
Beam parameter simulation of the Rossendorfer SRF gun and comparison with other RF photoinjectors |
F. Staufenbiel
|
| 10:00 (25 +5q) |
Cell length optimization of photocathode rf gun cavity |
Jang-Hui Han
|
| 10:30 - 11:00 |
Coffee |
|
| 11:00 (25+5q) |
Parallelization and other new features in elegant |
Michael Borland
|
| 11:30 (25+5q) |
Simulation and Optimisation of the JLab/AES DC Photo-injector
|
Fay Hannon
|
| 12:00 (25+5q) |
Design and Simulation of the 4GLS High Average Current Loop DC Photoinjector
|
Julian McKenzie
|
Session 4 - (Joint with WG3) SRF Guns and joint session with WG3 (Wed 14:00 - 17:30)
| Time |
Title |
Presenter |
| 14:00 (25 +5q) |
Status of the BNL DESY hybrid SRF photoinjector |
John Smedley
|
| 14:30 (25+5q) |
Status of the Superconducting RF Photo-injector Development |
J. Teichert
|
| 15:00 (25+5q) |
Status of the BNL 703 MHz photoinjector |
Andrew Burrill
|
| 15:30 - 16:00 |
Coffee |
|
| 16:00 (25+5q) |
Joint Session with WG3 |
|
Session 5 - Photocathodes and Lasers (Thu 09:00 - 13:00)
| Time |
Title |
Presenter |
| 09:00 (25 +5q) |
Status of Diamond Secondary emitter photocathode |
Triveni Rao
|
| 09:30 (25 +5q) |
3D simulations of Secondary Electron Generation in Diamond Amplifiers and Modeling of RF Guns with VORPAL |
D. A. Dimitrov
|
| 10:00 (25 +5q) |
Experience with fiber-based drive lasers |
M Poelker
|
| 10:30 - 11:00 |
Coffee |
|
| 11:00 (25 +5q) |
Drive Lasers for ERLP and 4GLS |
Lee Jones
|
| 11:30 (25 +5q) |
Spatial and Temporal Control of High Energy Femtosecond Laser pulses for photoinjectors: Results and Perspectives at CEA-Saclay |
D. Garzella
|
Session 6 - (Thursday 14:00-15:30)
| Time |
Title |
Presenter |
| 90 |
Discussions as needed / desired |
All |
Session 7 - (Thursday 16:30-18:00)
| Time |
Title |
Presenter |
| 90 |
Writing WG reports |
All |
Session 8 - (Friday 09:00-10:30
| Time |
Title |
Presenter |
| 90 |
Writing WG reports |
All
|
|
|
