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Title: An ultrafast laser pulse picker technique for high-average-current high-brightness photoinjectors

Abstract

Beam diagnostics in high brightness photoinjectors requires that optical pulses from a high-power drive laser be picked up with an ultrahigh pulse contrast ratio and without temporal profile distortion. In high-average-current high-brightness photoinjectors, high-power drive lasers are routinely operated at GHz-level pulse repetition rate and it is challenging to achieve pulse picking without any pulse distortion. Here, we report on a new ultrafast pulse picker technique for beam diagnostics in high-average-current high-brightness photoinjectors. By efficiently combining an ultrafast low-power electro-optic modulator, high-power fiber laser amplifiers, a high-power Pockels Cell, and a frequency doubling module, we have successfully demonstrated optical bunch (30 pulses per bunch) pickup from a 704 MHz high-power drive laser and achieved a 106:1 pulse contrast ratio and nearly zero pulse distortion. The performance of this pulse picking technique has been verified through beam characterization and electron cooling in the low energy RHIC electron cooling accelerator at Brookhaven National Laboratory.

Authors:
 [1];  [1];  [1];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1597260
Alternate Identifier(s):
OSTI ID: 1599235
Report Number(s):
BNL-213602-2020-JAAM
Journal ID: ISSN 0168-9002; TRN: US2103072
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 959; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; Beam diagnostics; Bunch time structure; High average current high brightness photoinjector; High-power fiber laser; Ultrafast pulse picker; Ultrahigh contrast ratio

Citation Formats

Zhao, Zhi, Mernick, Kevin, Costano, Michael, and Minty, Michiko. An ultrafast laser pulse picker technique for high-average-current high-brightness photoinjectors. United States: N. p., 2020. Web. https://doi.org/10.1016/j.nima.2020.163586.
Zhao, Zhi, Mernick, Kevin, Costano, Michael, & Minty, Michiko. An ultrafast laser pulse picker technique for high-average-current high-brightness photoinjectors. United States. https://doi.org/10.1016/j.nima.2020.163586
Zhao, Zhi, Mernick, Kevin, Costano, Michael, and Minty, Michiko. Sat . "An ultrafast laser pulse picker technique for high-average-current high-brightness photoinjectors". United States. https://doi.org/10.1016/j.nima.2020.163586. https://www.osti.gov/servlets/purl/1597260.
@article{osti_1597260,
title = {An ultrafast laser pulse picker technique for high-average-current high-brightness photoinjectors},
author = {Zhao, Zhi and Mernick, Kevin and Costano, Michael and Minty, Michiko},
abstractNote = {Beam diagnostics in high brightness photoinjectors requires that optical pulses from a high-power drive laser be picked up with an ultrahigh pulse contrast ratio and without temporal profile distortion. In high-average-current high-brightness photoinjectors, high-power drive lasers are routinely operated at GHz-level pulse repetition rate and it is challenging to achieve pulse picking without any pulse distortion. Here, we report on a new ultrafast pulse picker technique for beam diagnostics in high-average-current high-brightness photoinjectors. By efficiently combining an ultrafast low-power electro-optic modulator, high-power fiber laser amplifiers, a high-power Pockels Cell, and a frequency doubling module, we have successfully demonstrated optical bunch (30 pulses per bunch) pickup from a 704 MHz high-power drive laser and achieved a 106:1 pulse contrast ratio and nearly zero pulse distortion. The performance of this pulse picking technique has been verified through beam characterization and electron cooling in the low energy RHIC electron cooling accelerator at Brookhaven National Laboratory.},
doi = {10.1016/j.nima.2020.163586},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = C,
volume = 959,
place = {United States},
year = {2020},
month = {4}
}

Works referenced in this record:

Linac Coherent Light Source: The first five years
journal, March 2016


Generation of 180 W average green power from a frequency-doubled picosecond rod fiber amplifier
journal, January 2017

  • Zhao, Zhi; Sheehy, Brian; Minty, Michiko
  • Optics Express, Vol. 25, Issue 7
  • DOI: 10.1364/OE.25.008138

Experimental Demonstration of Hadron Beam Cooling Using Radio-Frequency Accelerated Electron Bunches
journal, February 2020


High-brightness electron beams for linac-based bunched beam electron cooling
journal, February 2020


Design and test of 704 MHz and 2.1 GHz normal conducting cavities for low energy RHIC electron cooler
journal, March 2019


Energy recovery linacs as synchrotron light sources
journal, March 2003

  • Gruner, Sol M.; Bilderback, Donald H.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 500, Issue 1-3
  • DOI: 10.1016/S0168-9002(03)00738-1

Record high-average current from a high-brightness photoinjector
journal, January 2013

  • Dunham, Bruce; Barley, John; Bartnik, Adam
  • Applied Physics Letters, Vol. 102, Issue 3
  • DOI: 10.1063/1.4789395

High-power fiber lasers for photocathode electron injectors
journal, May 2014

  • Zhao, Zhi; Bartnik, Adam; Wise, Frank W.
  • Physical Review Special Topics - Accelerators and Beams, Vol. 17, Issue 5
  • DOI: 10.1103/PhysRevSTAB.17.053501

Demonstration of low emittance in the Cornell energy recovery linac injector prototype
journal, July 2013

  • Gulliford, Colwyn; Bartnik, Adam; Bazarov, Ivan
  • Physical Review Special Topics - Accelerators and Beams, Vol. 16, Issue 7
  • DOI: 10.1103/PhysRevSTAB.16.073401

Accurate setting of electron energy for demonstration of first hadron beam cooling with rf-accelerated electron bunches
journal, November 2019


Efficient temporal shaping of ultrashort pulses with birefringent crystals
journal, January 2007

  • Zhou, Shian; Ouzounov, Dimitre; Li, Heng
  • Applied Optics, Vol. 46, Issue 35, p. 8488-8492
  • DOI: 10.1364/AO.46.008488

Stable operation of a high-voltage high-current dc photoemission gun for the bunched beam electron cooler in RHIC
journal, January 2020


PERLE. Powerful energy recovery linac for experiments. Conceptual design report
journal, May 2018

  • Angal-Kalinin, D.; Arduini, G.; Auchmann, B.
  • Journal of Physics G: Nuclear and Particle Physics, Vol. 45, Issue 6
  • DOI: 10.1088/1361-6471/aaa171

Narrow linewidth picosecond UV pulsed laser with mega-watt peak power
journal, January 2013

  • Huang, Chunning; Deibele, Craig; Liu, Yun
  • Optics Express, Vol. 21, Issue 7
  • DOI: 10.1364/OE.21.009123

Efficient temporal shaping of electron distributions for high-brightness photoemission electron guns
journal, April 2008

  • Bazarov, Ivan V.; Ouzounov, Dimitre G.; Dunham, Bruce M.
  • Physical Review Special Topics - Accelerators and Beams, Vol. 11, Issue 4
  • DOI: 10.1103/PhysRevSTAB.11.040702

    Works referencing / citing this record:

    High-brightness electron beams for linac-based bunched beam electron cooling
    journal, February 2020