Electron beam and rf characterization of a low-emittance X-band photoinjector
Detailed experimental studies of the first operation of an X-band (8.547 GHz) rf photoinjector are reported. The rf characteristics of the device are first described, as well as the tuning technique used to ensure operation of the 11/2-cell rf gun in the balanced π-mode. The characterization of the...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2001-09-01
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| Series: | Physical Review Special Topics. Accelerators and Beams |
| Online Access: | http://doi.org/10.1103/PhysRevSTAB.4.090101 |
| _version_ | 1819138959435890688 |
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| author | D. J. Gibson F. V. Hartemann E. C. Landahl A. L. Troha N. C. Luhmann, Jr. G. P. Le Sage C. H. Ho |
| author_facet | D. J. Gibson F. V. Hartemann E. C. Landahl A. L. Troha N. C. Luhmann, Jr. G. P. Le Sage C. H. Ho |
| author_sort | D. J. Gibson |
| collection | DOAJ |
| description | Detailed experimental studies of the first operation of an X-band (8.547 GHz) rf photoinjector are reported. The rf characteristics of the device are first described, as well as the tuning technique used to ensure operation of the 11/2-cell rf gun in the balanced π-mode. The characterization of the photoelectron beam produced by the rf gun includes: measurements of the bunch charge as a function of the laser injection phase, yielding information about the quantum efficiency of the Cu photocathode ( 2×10^{-5} for a surface field of 100 MV/m); measurements of the beam energy (1.5–2 MeV) and relative energy spread ( Δγ/γ_{0}=1.8±0.2%) using a magnetic spectrometer; measurements of the beam 90% normalized emittance, which is found to be ɛ_{n}=1.65π mm mrad for a charge of 25 pC; and measurements of the bunch duration ( <2 ps). Coherent synchrotron radiation experiments at Ku-band and Ka-band confirm the extremely short duration of the photoelectron bunch and a peak power scaling quadratically with the bunch charge. |
| first_indexed | 2024-12-22T11:15:03Z |
| format | Article |
| id | doaj.art-46eb390859264b7eaadea05d520ac270 |
| institution | Directory Open Access Journal |
| issn | 1098-4402 |
| language | English |
| last_indexed | 2024-12-22T11:15:03Z |
| publishDate | 2001-09-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Special Topics. Accelerators and Beams |
| spelling | doaj.art-46eb390859264b7eaadea05d520ac2702022-12-21T18:28:02ZengAmerican Physical SocietyPhysical Review Special Topics. Accelerators and Beams1098-44022001-09-014909010110.1103/PhysRevSTAB.4.090101Electron beam and rf characterization of a low-emittance X-band photoinjectorD. J. GibsonF. V. HartemannE. C. LandahlA. L. TrohaN. C. Luhmann, Jr.G. P. Le SageC. H. HoDetailed experimental studies of the first operation of an X-band (8.547 GHz) rf photoinjector are reported. The rf characteristics of the device are first described, as well as the tuning technique used to ensure operation of the 11/2-cell rf gun in the balanced π-mode. The characterization of the photoelectron beam produced by the rf gun includes: measurements of the bunch charge as a function of the laser injection phase, yielding information about the quantum efficiency of the Cu photocathode ( 2×10^{-5} for a surface field of 100 MV/m); measurements of the beam energy (1.5–2 MeV) and relative energy spread ( Δγ/γ_{0}=1.8±0.2%) using a magnetic spectrometer; measurements of the beam 90% normalized emittance, which is found to be ɛ_{n}=1.65π mm mrad for a charge of 25 pC; and measurements of the bunch duration ( <2 ps). Coherent synchrotron radiation experiments at Ku-band and Ka-band confirm the extremely short duration of the photoelectron bunch and a peak power scaling quadratically with the bunch charge.http://doi.org/10.1103/PhysRevSTAB.4.090101 |
| spellingShingle | D. J. Gibson F. V. Hartemann E. C. Landahl A. L. Troha N. C. Luhmann, Jr. G. P. Le Sage C. H. Ho Electron beam and rf characterization of a low-emittance X-band photoinjector Physical Review Special Topics. Accelerators and Beams |
| title | Electron beam and rf characterization of a low-emittance X-band photoinjector |
| title_full | Electron beam and rf characterization of a low-emittance X-band photoinjector |
| title_fullStr | Electron beam and rf characterization of a low-emittance X-band photoinjector |
| title_full_unstemmed | Electron beam and rf characterization of a low-emittance X-band photoinjector |
| title_short | Electron beam and rf characterization of a low-emittance X-band photoinjector |
| title_sort | electron beam and rf characterization of a low emittance x band photoinjector |
| url | http://doi.org/10.1103/PhysRevSTAB.4.090101 |
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