Half wave injector design for WiFEL

Robert Legg, William Graves, Terry Grimm, Philippe Piot

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Citations (Scopus)

Abstract

Seeded FELs will require exceptional beam quality. The Wisconsin FEL (WiFEL) requires average current of 1 mA, peak currents of greater than 1 kA with less than 1 mm-mrad transverse slice emittance and 10-4 δp/p at the undulator. To perform bunch compression after the injector without allowing micro-bunching requires very smooth bunch energy and density profiles with relatively low compression ratios. An injector which uses a low frequency, superconducting half wave resonator gun combined with self-inflating ellipsoidal bunches[1] to meet those requirements is described. The superconducting radio frequency TEM-class cavities have been in use for more than 25 years and because of their potential for flat field profiles, are desirable as electron gun structures. A Superfish[2] model and field map of the specific gun cavity is presented. ASTRA[3] simulations from the cathode to 120 MeV are provided, along with a description of the technique used to emittance compensate the space charge induced energy chirp while maintaining the peak bunch current.

Original languageEnglish (US)
Title of host publicationEPAC 2008 - Contributions to the Proceedings
PublisherEuropean Physical Society Accelerator Group (EPS-AG)
Pages469-471
Number of pages3
StatePublished - 2008
Externally publishedYes
Event11th European Particle Accelerator Conference, EPAC 2008 - Genoa, Italy
Duration: Jun 23 2008Jun 27 2008

Other

Other11th European Particle Accelerator Conference, EPAC 2008
CountryItaly
CityGenoa
Period6/23/086/27/08

Fingerprint

injectors
emittance
inflating
cavities
compression ratio
bunching
electron guns
profiles
chirp
space charge
radio frequencies
cathodes
resonators
low frequencies
requirements
transmission electron microscopy
energy
simulation

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Legg, R., Graves, W., Grimm, T., & Piot, P. (2008). Half wave injector design for WiFEL. In EPAC 2008 - Contributions to the Proceedings (pp. 469-471). European Physical Society Accelerator Group (EPS-AG).

Half wave injector design for WiFEL. / Legg, Robert; Graves, William; Grimm, Terry; Piot, Philippe.

EPAC 2008 - Contributions to the Proceedings. European Physical Society Accelerator Group (EPS-AG), 2008. p. 469-471.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Legg, R, Graves, W, Grimm, T & Piot, P 2008, Half wave injector design for WiFEL. in EPAC 2008 - Contributions to the Proceedings. European Physical Society Accelerator Group (EPS-AG), pp. 469-471, 11th European Particle Accelerator Conference, EPAC 2008, Genoa, Italy, 6/23/08.
Legg R, Graves W, Grimm T, Piot P. Half wave injector design for WiFEL. In EPAC 2008 - Contributions to the Proceedings. European Physical Society Accelerator Group (EPS-AG). 2008. p. 469-471
Legg, Robert ; Graves, William ; Grimm, Terry ; Piot, Philippe. / Half wave injector design for WiFEL. EPAC 2008 - Contributions to the Proceedings. European Physical Society Accelerator Group (EPS-AG), 2008. pp. 469-471
@inproceedings{984a19a6385b4d57bdeaf9ba436c67ad,
title = "Half wave injector design for WiFEL",
abstract = "Seeded FELs will require exceptional beam quality. The Wisconsin FEL (WiFEL) requires average current of 1 mA, peak currents of greater than 1 kA with less than 1 mm-mrad transverse slice emittance and 10-4 δp/p at the undulator. To perform bunch compression after the injector without allowing micro-bunching requires very smooth bunch energy and density profiles with relatively low compression ratios. An injector which uses a low frequency, superconducting half wave resonator gun combined with self-inflating ellipsoidal bunches[1] to meet those requirements is described. The superconducting radio frequency TEM-class cavities have been in use for more than 25 years and because of their potential for flat field profiles, are desirable as electron gun structures. A Superfish[2] model and field map of the specific gun cavity is presented. ASTRA[3] simulations from the cathode to 120 MeV are provided, along with a description of the technique used to emittance compensate the space charge induced energy chirp while maintaining the peak bunch current.",
author = "Robert Legg and William Graves and Terry Grimm and Philippe Piot",
year = "2008",
language = "English (US)",
pages = "469--471",
booktitle = "EPAC 2008 - Contributions to the Proceedings",
publisher = "European Physical Society Accelerator Group (EPS-AG)",

}

TY - GEN

T1 - Half wave injector design for WiFEL

AU - Legg, Robert

AU - Graves, William

AU - Grimm, Terry

AU - Piot, Philippe

PY - 2008

Y1 - 2008

N2 - Seeded FELs will require exceptional beam quality. The Wisconsin FEL (WiFEL) requires average current of 1 mA, peak currents of greater than 1 kA with less than 1 mm-mrad transverse slice emittance and 10-4 δp/p at the undulator. To perform bunch compression after the injector without allowing micro-bunching requires very smooth bunch energy and density profiles with relatively low compression ratios. An injector which uses a low frequency, superconducting half wave resonator gun combined with self-inflating ellipsoidal bunches[1] to meet those requirements is described. The superconducting radio frequency TEM-class cavities have been in use for more than 25 years and because of their potential for flat field profiles, are desirable as electron gun structures. A Superfish[2] model and field map of the specific gun cavity is presented. ASTRA[3] simulations from the cathode to 120 MeV are provided, along with a description of the technique used to emittance compensate the space charge induced energy chirp while maintaining the peak bunch current.

AB - Seeded FELs will require exceptional beam quality. The Wisconsin FEL (WiFEL) requires average current of 1 mA, peak currents of greater than 1 kA with less than 1 mm-mrad transverse slice emittance and 10-4 δp/p at the undulator. To perform bunch compression after the injector without allowing micro-bunching requires very smooth bunch energy and density profiles with relatively low compression ratios. An injector which uses a low frequency, superconducting half wave resonator gun combined with self-inflating ellipsoidal bunches[1] to meet those requirements is described. The superconducting radio frequency TEM-class cavities have been in use for more than 25 years and because of their potential for flat field profiles, are desirable as electron gun structures. A Superfish[2] model and field map of the specific gun cavity is presented. ASTRA[3] simulations from the cathode to 120 MeV are provided, along with a description of the technique used to emittance compensate the space charge induced energy chirp while maintaining the peak bunch current.

UR - http://www.scopus.com/inward/record.url?scp=84898996488&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84898996488&partnerID=8YFLogxK

M3 - Conference contribution

SP - 469

EP - 471

BT - EPAC 2008 - Contributions to the Proceedings

PB - European Physical Society Accelerator Group (EPS-AG)

ER -