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Mass separated particle flux from a laser-ablation metal cluster source

Published online by Cambridge University Press:  11 September 2019

Yuta Ishikawa*
Affiliation:
Tokyo Institute of Technology, Ookayama Meguro-ku, Tokyo152-8550, Japan
Jun Hasegawa
Affiliation:
Tokyo Institute of Technology, Ookayama Meguro-ku, Tokyo152-8550, Japan
Kazuhiko Horioka
Affiliation:
KEK, Tsukuba, Ibaraki305-0801, Japan
*
Author for correspondence: Yuta Ishikawa, Tokyo Institute of Technology, Ookayama Meguro-ku, Tokyo152-8550, Japan, E-mail: ishikawa.y.ai@m.titech.ac.jp

Abstract

Flux waveforms of aluminum cluster beams supplied from a laser-ablation cluster source were precisely investigated under various source conditions such as background pressure, ablation laser intensity, and nozzle structure. A time-of-flight mass spectroscopy revealed that aluminum clusters with sizes up to 200 were generated and the amount of the clusters could be maximized by choosing a proper background pressure (~2 MPa) and an ablation laser fluence (~40 mJ/cm2). Flux waveforms of clusters having specific sizes were carefully reconstructed from the observed mass spectra. It is found that the pulse widths of the aluminum cluster beams were typically about 100 µs and much smaller than that of the monoatomic aluminum beam, indicating that the cluster formation was limited in a relatively small volume in the laser-ablated vapor. Introducing a conical nozzle having a large open angle was also found to enhance the cluster beam velocity and reduce its pulse width. A velocity measurement of particles in the cluster beam was conducted to examine the velocity spread of the supplied clusters. We found that the aluminum clusters were continuously released from the source for about 100 µs and this release time mainly determined the pulse width of the cluster beam, suggesting that controlling the behavior of an ablated vapor plume in the waiting room of the cluster source holds the key to drastically improving the cluster beam flux.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2019

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References

Alford, JM, Weiss, FD, Laaksonen, RT and Smalley, RE (1986) Dissociative chemisorption of molecular hydrogen on niobium cluster ions. A supersonic cluster beam FT-ICR experiment. The Journal of Physical Chemistry 90, 44804482.CrossRefGoogle Scholar
Baudin, K, Brunelle, A, Chabot, M, Della-Negra, S, Depauw, J, Gardès, D, Håkansson, P, Beyec, YL, Billebaud, A, Fallavier, M, Remillieux, J, Poizat, JC and Thomas, JP (1994) Energy loss by MeV carbon clusters and fullerene ions in solids. Nuclear Instruments and Methods in Physics Research Section B: 94, 341344.CrossRefGoogle Scholar
Brucat, PJ, Zheng, LS, Pettiette, CL, Yang, S and Smalley, RE (1986) Metal cluster ion photofragmentation. The Journal of Chemical Physics 84, 30783088.CrossRefGoogle Scholar
Brunelle, A, Della-Negra, S, Depauw, J, Jacquet, D, Le Beyec, Y and Pautrat, M (1999) Reduced charge state of MeV carbon cluster constituents exiting thin carbon foils. Physical Review A 59, 4456.CrossRefGoogle Scholar
Brunelle, A, Della-Negra, S, Depauw, J, Jacquet, D, Le Beyec, Y, Pautrat, M, Baudin, K and Andersen, HH (2001) Enhanced secondary-ion emission under gold-cluster bombardment with energies from keV to MeV per atom. Physical Review A 63, 022902.CrossRefGoogle Scholar
Bucher, JP, Douglass, DC and Bloomfield, LA (1991) Magnetic properties of free cobalt clusters. Physical Review Letters 66, 3052.CrossRefGoogle ScholarPubMed
Dammak, H, Dunlop, A, Lesueur, D, Brunelle, A, Della-Negra, S and Le Beyec, Y (1995) Tracks in metals by MeV fullerenes. Physical Review Letters 74, 1135.CrossRefGoogle ScholarPubMed
Dietz, TG, Duncan, MA, Powers, DE and Smalley, RE (1981) Laser production of supersonic metal cluster beams. The Journal of Chemical Physics 74, 65116512.CrossRefGoogle Scholar
Dixit, TS, Iwashita, T and Takayama, K (2009) Induction acceleration scenario from an extremely low energy in the KEK all-ion accelerator. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 602, 326336.CrossRefGoogle Scholar
Ganteför, G, Gausa, M, Meiwes-Broer, KH and Lutz, HO (1988) Photoelectron spectroscopy of jet-cooled aluminium cluster anions. Zeitschrift für Physik D Atoms, Molecules and Clusters 9, 253261.CrossRefGoogle Scholar
Hasselkamp, D and Scharmann, A (1983) Ion-induced electron emission from carbon. Physica Status Solidi. A, Applied Research 79, K197K200.CrossRefGoogle Scholar
Kohl, JL and Parkinson, WH (1973) Measurement of the neutral-aluminum photoionization cross-section and parameters of the 3p 2PO-3s3p2 2S112 autoionization doublet. The Astrophysical Journal 184, 641652.CrossRefGoogle Scholar
Milani, P and deHeer, WA (1990) Improved pulsed laser vaporization source for production of intense beams of neutral and ionized clusters. Review of Scientific Instruments 61, 18351838.CrossRefGoogle Scholar
Morse, MD, Geusic, ME, Heath, JR and Smalley, RE (1985) Surface reactions of metal clusters. II. Reactivity surveys with D2, N2, and CO. The Journal of Chemical Physics 83, 22932304.CrossRefGoogle Scholar
Narumi, K, Nakajima, K, Kimura, K, Mannami, MH, Saitoh, Y, Yamamoto, S, Aoki, Y and Naramoto, H (1998) Energy losses of B clusters transmitted through carbon foils. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 135, 7781.CrossRefGoogle Scholar
Ray, E, Kirsch, R, Mikkelsen, HH, Poizat, JC and Remillieux, J (1992) Slowing down of hydrogen clusters in thin foils. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 69, 133141.CrossRefGoogle Scholar
Rohlfing, EA, Cox, DM and Kaldor, A (1984) Production and characterization of supersonic carbon cluster beams. The Journal of Chemical Physics 81, 33223330.CrossRefGoogle Scholar
Schriver, KE, Persson, JL, Honea, EC and Whetten, RL (1990) Electronic shell structure of group-IIIA metal atomic clusters. Physical Review Letters 64, 2539.CrossRefGoogle ScholarPubMed
Takayama, K, Arakida, Y, Iwashita, T, Shimosaki, Y, Dixit, T and Torikai, K (2007) All-ion accelerators: An injector-free synchrotron. Journal of Applied Physics 101, 063304.CrossRefGoogle Scholar
Takayama, K, Adachi, T, Wake, M and Okamura, K (2015) Racetrack-shape fixed field induction accelerator for giant cluster ions. Physical Review Special Topics-Accelerators and Beams 18, 050101.CrossRefGoogle Scholar
Tomaschko, C, Schurr, M, Berger, R, Saemann-Ischenko, G, Voit, H, Brunelle, A, Della-Negra, S and LeBeyec, Y (1995) Visualization of craters in a Langmuir ‒ Blodgett film from the impact of 23 MeV C ions. Rapid Communications in Mass Spectrometry 9, 924926.CrossRefGoogle Scholar
Tomita, S, Murakami, M, Sakamoto, N, Ishii, S, Sasa, K, Kaneko, T and Kudo, H (2010) Reduction in the energy loss of 0.5-MeV-per-atom carbon-cluster ions in thin carbon foils. Physical Review A 82, 044901.CrossRefGoogle Scholar
Whetten, RL, Cox, DM, Trevor, DJ and Kaldor, A (1985) Correspondence between electron binding energy and chemisorption reactivity of iron clusters. Physical Review Letters 54, 1494.CrossRefGoogle ScholarPubMed
Yamada, I, Matsuo, J, Toyoda, N and Kirkpatrick, A (2001) Materials processing by gas cluster ion beams. Materials Science and Engineering: R: Reports 34, 231295.CrossRefGoogle Scholar