Laser power density dependence on charge state distribution of Ta ion laser plasma

Okamura, Masahiro; Tamis, Andrew; Whelan, Tommy; Kanesue, Takeshi; Ikeda, Shunsuke; Cannavò, Antonino

doi:10.1063/1.5129530

Title: Laser power density dependence on charge state distribution of Ta ion laser plasma

Abstract

Laser power density per pulse, which is commonly expressed with the unit of “W/cm2,” is an important parameter to characterize ablation plasma. To match a design charge state of heavy ion beam induced by a laser ion source, a laser power density must be carefully chosen. Above around 108 W/cm2 of laser power density, laser ablation plasma is emitted from the surface of solid material. Then, up to 109 W/cm2, the most abundant charge state is 1+. Because the ionization energy increases with higher charge states, increasing the laser intensity leads to the charge state distribution shifting higher. Increasing the density to increase charge states also results in lower time of flight due to higher velocities. The maximum laser power density is obtained by the smallest available laser spot size on the target material which is determined by the quality of the laser beam. For many accelerator applications, higher charge state beams are preferred. In particular cases, singly charge ion beams are demanded. Therefore, production of intermediate charge state beams has not been investigated well. In this study, we selected Ta4+ as an example demanded beam and tried to clarify how the transition of charge state distribution depends on lasermore »« less

Authors:

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Publication Date:: Thu Jan 23 00:00:00 EST 2020

Sponsoring Org.:: USDOE

OSTI Identifier:: 1593486

Grant/Contract Number:: SC0012704

Resource Type:: Publisher's Accepted Manuscript

Journal Name:: Review of Scientific Instruments

Additional Journal Information:: Journal Name: Review of Scientific Instruments Journal Volume: 91 Journal Issue: 1; Journal ID: ISSN 0034-6748

Publisher:: American Institute of Physics

Country of Publication:: United States

Language:: English

Citation Formats


                    Okamura, Masahiro, Tamis, Andrew, Whelan, Tommy, Kanesue, Takeshi, Ikeda, Shunsuke, and Cannavò, Antonino. Laser power density dependence on charge state distribution of Ta ion laser plasma.  United States: N. p., 2020. 
Web.  doi:10.1063/1.5129530.

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                    Okamura, Masahiro, Tamis, Andrew, Whelan, Tommy, Kanesue, Takeshi, Ikeda, Shunsuke, & Cannavò, Antonino. Laser power density dependence on charge state distribution of Ta ion laser plasma.  United States.  https://doi.org/10.1063/1.5129530

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                    Okamura, Masahiro, Tamis, Andrew, Whelan, Tommy, Kanesue, Takeshi, Ikeda, Shunsuke, and Cannavò, Antonino. Thu .  
"Laser power density dependence on charge state distribution of Ta ion laser plasma".  United States.  https://doi.org/10.1063/1.5129530.

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@article{osti_1593486,

  title        = {Laser power density dependence on charge state distribution of Ta ion laser plasma},

  author       = {Okamura, Masahiro and Tamis, Andrew and Whelan, Tommy and Kanesue, Takeshi and Ikeda, Shunsuke and Cannavò, Antonino},

  abstractNote = {Laser power density per pulse, which is commonly expressed with the unit of “W/cm2,” is an important parameter to characterize ablation plasma. To match a design charge state of heavy ion beam induced by a laser ion source, a laser power density must be carefully chosen. Above around 108 W/cm2 of laser power density, laser ablation plasma is emitted from the surface of solid material. Then, up to 109 W/cm2, the most abundant charge state is 1+. Because the ionization energy increases with higher charge states, increasing the laser intensity leads to the charge state distribution shifting higher. Increasing the density to increase charge states also results in lower time of flight due to higher velocities. The maximum laser power density is obtained by the smallest available laser spot size on the target material which is determined by the quality of the laser beam. For many accelerator applications, higher charge state beams are preferred. In particular cases, singly charge ion beams are demanded. Therefore, production of intermediate charge state beams has not been investigated well. In this study, we selected Ta4+ as an example demanded beam and tried to clarify how the transition of charge state distribution depends on laser power density. Conclusively, the possible specification of a laser ion source for Ta4+ delivery was elucidated.},

  doi          = {10.1063/1.5129530},

  journal      = {Review of Scientific Instruments},

  number       = 1,

  volume       = 91,

  place        = {United States},

  year         = {Thu Jan 23 00:00:00 EST 2020},

  month        = {Thu Jan 23 00:00:00 EST 2020}

}

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Works referenced in this record:

Development of C 6+ laser ion source and RFQ linac for carbon ion radiotherapy
journal, February 2016

Sako, T.; Yamaguchi, A.; Sato, K.
Review of Scientific Instruments, Vol. 87, Issue 2
DOI: 10.1063/1.4935975

Optimization of U 4+ output of the MEVVA ion source
journal, March 1996

Batalin, V. A.; Kuybeda, R. P.; Kulevoy, T. V.
Review of Scientific Instruments, Vol. 67, Issue 3
DOI: 10.1063/1.1146732

Laser plasma in a magnetic field
journal, February 2010

Kondo, K.; Kanesue, T.; Tamura, J.
Review of Scientific Instruments, Vol. 81, Issue 2
DOI: 10.1063/1.3290860

Direct injection of fully stripped carbon ions into a fast-cycling induction synchrotron and their capture by the barrier bucket
journal, August 2017

Munemoto, N.; Takano, S.; Kadokura, E.
Physical Review Accelerators and Beams, Vol. 20, Issue 8
DOI: 10.1103/physrevaccelbeams.20.080101

Developments at the CERN laser ion source
journal, February 1998

Haseroth, H.; Kugler, H.; Langbein, K.
Review of Scientific Instruments, Vol. 69, Issue 2
DOI: 10.1063/1.1148630

Laser ion source for Columbia University’s microbeam
journal, December 2005

Bigelow, A. W.; Randers-Pehrson, G.; Kelly, R. P.
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 241, Issue 1-4
DOI: 10.1016/j.nimb.2005.07.144

Effect of solenoidal magnetic field on drifting laser plasma
conference, January 2013

Takahashi, Kazumasa; Okamura, Masahiro; Sekine, Megumi
APPLICATION OF ACCELERATORS IN RESEARCH AND INDUSTRY: Twenty-Second International Conference, AIP Conference Proceedings
DOI: 10.1063/1.4802327

Note: A pulsed laser ion source for linear induction accelerators
journal, January 2015

Zhang, H.; Zhang, K.; Shen, Y.
Review of Scientific Instruments, Vol. 86, Issue 1
DOI: 10.1063/1.4905363

Tantalum ions produced by 1064 nm pulsed laser irradiation
journal, April 2002

Torrisi, L.; Gammino, S.; Andò, L.
Journal of Applied Physics, Vol. 91, Issue 7
DOI: 10.1063/1.1446660

Laser ion source activities at Brookhaven National Laboratory
journal, April 2015

Kanesue, Takeshi; Okamura, Masahiro
Radiation Effects and Defects in Solids, Vol. 170, Issue 4
DOI: 10.1080/10420150.2015.1036427

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Title: Laser power density dependence on charge state distribution of Ta ion laser plasma

Abstract

Citation Formats

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