| Paper |
Title |
Page |
WG304 |
Superconducting RF systems in the R&D ERL at BNL |
|
| |
- W. Xu, Z. Altinbas, S.A. Belomestnykh, I. Ben-Zvi, J. Dai, S. Deonarine, D.M. Gassner, H. Hahn, J.P. Jamilkowski, P. Kankiya, D. Kayran, N. Laloudakis, L. Masi, G.T. McIntyre, T.A. Miller, D. Pate, D. Phillips, T. Seda, K.S. Smith, A.N. Steszyn, T.N. Tallerico, R. Than, R.J. Todd, D. Weiss, A. Zaltsman
BNL, Upton, Long Island, New York, USA
- S.A. Belomestnykh, J. Dai
Stony Brook University, Stony Brook, USA
|
|
| |
Funding: This work is supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. DOE.
The R&D ERL project at BNL aims to demonstrate a high charge, high current energy recovery linac (ERL). The R&D ERL includes two superconducting RF systems: a half-cell superconducting RF (SRF) gun and a five-cell superconducting linac cryomodule, both operating at 703.7 MHz. A series of tests of the five-cell superconducting linac cavity has been carried out in the ERL cave in the past 4 years. The cavity is able to achieve 20 MV/m with a Q0 exceeding 1010 in pulse mode but only 12 MV/m in CW mode due to a thermal problem. The SRF gun has been conditioned and demonstrated an operational accelerating voltage of 2 MV (an accelerating gradient of 23.5 MV/m). This paper discusses commissioning of the SRF gun and the five-cell superconducting linac cryomodule, and the experience gained during operations of the superconducting RF system for the high current ERL.
|
|
|
Slides WG304 [3.359 MB]
|
|
| |
| PS11 |
Status of the BNL ERL Instrumentation |
100 |
| |
- D.M. Gassner, C. Liu, R.J. Michnoff, T.A. Miller, M.G. Minty, M. Wilinski
BNL, Upton, Long Island, New York, USA
|
|
| |
The R & D Energy Recovery Linac (ERL) project is currently under development at the Brookhaven National Laboratory. The ERL is expected to demonstrate energy recovery of high intensity beams with a current of up to a few hundred milliamps, while preserving the emittance of bunches with a charge of a few nC produced by a high current SRF gun. To successfully accomplish this task the machine will include beam diagnostics that will be used for accurate characterization of the three dimensional beam phase space at the injection and recirculation energies, transverse and longitudinal beam matching, orbit alignment, beam current measurement, and machine protection. This paper describes the present status of the instrumentation systems that will be used to meet these goals. Unfortunately we have not had any first electron beams yet.
|
|
|
Poster PS11 [1.738 MB]
|
|
| |
| PS14 |
Instrumentation Designs for Beam Distribution Measurements in the ERL Beam Dump at BNL |
108 |
| |
- T.A. Miller, S. Bellavia, I. Ben-Zvi, J.M. Fite, D.M. Gassner
BNL, Upton, Long Island, New York, USA
|
|
| |
The R&D Energy Recover Linac (ERL) at Brookhaven National Laboratory is undergoing continued development in parallel with piece-wise commissioning efforts as installation of each subsystem is completed. While the machine is planned to be operated at low intensity and short low frequency pulses during the commissioning phases, on going design efforts continue to provide a solution to measure the beam distribution inside the high power electron beam dump using several parallel methods. For low power measurements, this includes a new rad-hard version of long 7/8" heliax ion chambers that encage the dump both in circular and axial directions. For high power measurements, this includes both "pinhole" like multipoint imaging of the dump with ion chambers positioned over an array of holes drilled in the shielding around the beam dump and an Infrared imaging system to peer through an upstream bending magnet in the extraction line to monitor the temperature distribution on the target surface inside the dump. This paper presents the design details of these three systems that work to ensure the proper distribution of the high power electron beam on the target in an effort to avoid reaching the thermal limit of the water cooled beam dump.
|
|
|
|
Poster PS14 [21.016 MB]
|
|
| |