Nano-machining, surface analysis and emittance measurements of a copper photocathode at SPARC_LAB

Scifo, J.; Alesini, D.; Anania, M. P.; Bellaveglia, M.; Bellucci, S.; Biagioni, A.; Bisesto, F.; Cardelli, F.; Chiadroni, E.; Cianchi, A.; Costa, G.; Di Giovenale, D.; Di Pirro, G.; Di Raddo, R.; Dowell, D. H.; Ferrario, M.; Giribono, A.; Lorusso, A.; Micciulla, F.; Mostacci, A.; Passeri, D.; Perrone, A.; Piersanti, L.; Pompili, R.; Shpakov, V.; Stella, A.; Trovò, M.; Villa, F.

doi:10.1016/j.nima.2018.01.041

Title: Nano-machining, surface analysis and emittance measurements of a copper photocathode at SPARC_LAB

Journal Article · 31 January 2018 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI: https://doi.org/10.1016/j.nima.2018.01.041 · OSTI ID:1490679

Scifo, J. ^[1]; Alesini, D. ^[2]; Anania, M. P. ^[2]; Bellaveglia, M. ^[2]; Bellucci, S. ^[2]; Biagioni, A. ^[2]; Bisesto, F. ^[2]; Cardelli, F. ^[2]; Chiadroni, E. ^[2]; Cianchi, A. ^[3]; Costa, G. ^[2]; Di Giovenale, D. ^[2]; Di Pirro, G. ^[2]; Di Raddo, R. ^[2]; Dowell, D. H. ^[4]; Ferrario, M. ^[2]; Giribono, A. ^[2]; Lorusso, A. ^[5]; Micciulla, F. ^[6]; Mostacci, A. ^[7] more »

Lab. Nazionali di Frascati, Roma (Italy)
Lab. Nazionali di Frascati, Roma (Italy
Univ. degli Studi di Roma Tor Vergata (Italy)
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Univ. del Salento, Lecce (Italy). Dipt. di Matematica e Fisica E. De Giorgi
Lab. Nazionali di Frascati, Roma (Italy); Univ. degi Studi di Chieti e Pescara, Chieti (Italy). Dipartimento di Neuroscienze, Immaging e Scienze Cliniche Via dei Vestini
SBAI-Univ. di Roma “La Sapienza”, Roma (Italy)
Univ. del Salento, Lecce (Italy). Dipartimento di Matematica e Fisica E. De Giorgi
Elettra-Sincrotrone Trieste SCpA, Trieste (Italy)

R&D activity on Cu photocathodes is under development at the SPARC_LAB test facility to fully characterize each stage of the photocathode “life” and to have a complete overview of the photoemission properties in high brightness photo-injectors. The nano(n)-machining process presented here consists in diamond milling, and blowing with dry nitrogen. This procedure reduces the roughness of the cathode surface and prevents surface contamination introduced by other techniques, such as polishing with diamond paste or the machining with oil. Both high roughness and surface contamination cause an increase of intrinsic emittance and consequently a reduction of the overall electron beam brightness. To quantify these effects, we have characterized the photocathode surface in terms of roughness measurement, and morphology and chemical composition analysis by means of Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), and Atomic Force Microscopy (AFM) techniques. The effects of n-machining on the electron beam quality have been also investigated through emittance measurements before and after the surface processing technique. Finally, we present preliminary emittance studies of yttrium thin film on Cu photocathodes.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: 653782; AC02-76SF00515

OSTI ID:: 1490679

Journal Information:: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 909, Issue C; ISSN 0168-9002

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 12 works

Citation information provided by
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References (12)

Quantum efficiency and thermal emittance of metal photocathodes Dowell, David H.; Schmerge, John F. Physical Review Special Topics - Accelerators and Beams, Vol. 12, Issue 7 https://doi.org/10.1103/PhysRevSTAB.12.074201	journal	July 2009
SPARC_LAB present and future Ferrario, M.; Alesini, D.; Anania, M. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 309 https://doi.org/10.1016/j.nimb.2013.03.049	journal	August 2013
Application of Atomic Force Microscopy as a Nanotechnology Tool in Food Science Yang, Hongshun; Wang, Yifen; Lai, Shaojuan Journal of Food Science, Vol. 72, Issue 4 https://doi.org/10.1111/j.1750-3841.2007.00346.x	journal	May 2007
Analytical study on emittance growth caused by roughness of a metallic photocathode Zhang, Zhe; Tang, Chuanxiang Physical Review Special Topics - Accelerators and Beams, Vol. 18, Issue 5 https://doi.org/10.1103/PhysRevSTAB.18.053401	journal	May 2015
Near atomically smooth alkali antimonide photocathode thin films Feng, Jun; Karkare, Siddharth; Nasiatka, James Journal of Applied Physics, Vol. 121, Issue 4 https://doi.org/10.1063/1.4974363	journal	January 2017
Chromatic effects in quadrupole scan emittance measurements Mostacci, A.; Bellaveglia, M.; Chiadroni, E. Physical Review Special Topics - Accelerators and Beams, Vol. 15, Issue 8 https://doi.org/10.1103/PhysRevSTAB.15.082802	journal	August 2012
Photoemission studies on yttrium thin films Cultrera, L.; Gatti, G.; Lorusso, A. Radiation Effects and Defects in Solids, Vol. 165, Issue 6-10 https://doi.org/10.1080/10420151003729466	journal	October 2010
Detailed studies of photocathodes based on Y thin films grown by PLD technique Lorusso, A.; Cultrera, L.; Fasano, V. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 269, Issue 24 https://doi.org/10.1016/j.nimb.2011.04.065	journal	December 2011
Pulsed laser deposition of yttrium photocathode suitable for use in radio-frequency guns Lorusso, A.; Trovò, M.; Demidovich, A. Applied Physics A, Vol. 123, Issue 12 https://doi.org/10.1007/s00339-017-1396-1	journal	November 2017
The FERMI free-electron lasers Allaria, E.; Badano, L.; Bassanese, S. Journal of Synchrotron Radiation, Vol. 22, Issue 3 https://doi.org/10.1107/S1600577515005366	journal	April 2015
Pulsed laser deposition of yttrium photocathode suitable for use in radio-frequency guns Lorusso, A.; Trovò, M.; Demidovich, A. Applied Physics A, Vol. 123, Issue 12 https://doi.org/10.1007/s00339-017-1396-1	journal	November 2017
SPARC_LAB present and future Ferrario, M.; Alesini, D.; Anania, M. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 309 https://doi.org/10.1016/j.nimb.2013.03.049	journal	August 2013

Cited By (2)

Electron beams produced by innovative photocathodes based on nanodiamond layers Velardi, L.; Turco, V.; Monteduro, L. Physical Review Accelerators and Beams, Vol. 22, Issue 9 https://doi.org/10.1103/physrevaccelbeams.22.093402	journal	September 2019
Overestimation of thermal emittance in solenoid scans due to coupled transverse motion Zheng, Lianmin; Shao, Jiahang; Du, Yingchao arXiv https://doi.org/10.48550/arxiv.1809.06319	text	January 2018