Jao-Jang Su
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Previous Organizations / Institutes
The organizations / institutes from the scholar's other articles in the past ten years
Research Subjects
Jao-Jang Su has a total of 165 co-authors. Here are the top co-authors by number of shared publications:
T. Katsouleas
Dept. of Phys., California Univ., Los Angeles, CA, USA
15 shared publicationsJ. M. Dawson
Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, United Kingdom
10 shared publications- Robert Bingham
Central Laser Facility
10 shared publications P. Chen
Stanford Linear Accelerator Center, Stanford, CA, USA
6 shared publicationsD. Cline
University of California, Los Angeles, CA, USA
4 shared publicationsJ. Norem
Argonne National Laboratory, Argonne, IL, USA
4 shared publications
Latest Publications
- 1 November 2018
- Published by Elsevier in Planetary and Space Science
- Vol. 162, 105-112
Crater age and hydrogen content in lunar regolith from LEND neutron data
- 1 November 2018
- Published by Elsevier in Planetary and Space Science
- Vol. 162, 105-112
Crater age and hydrogen content in lunar regolith from LEND neutron data
- 1 November 2018
- Published by Elsevier in Planetary and Space Science
- Vol. 162, 89-104
Background and lunar neutron populations detected by LEND and average concentration of near-surface hydrogen near the Moon's poles
- 1 November 2018
- Published by Elsevier in Planetary and Space Science
- Vol. 162, 89-104
Background and lunar neutron populations detected by LEND and average concentration of near-surface hydrogen near the Moon's poles
- 24 May 2018
- Published by Taylor & Francis
- p. 225-248
Advances in Charged Particle Therapy Machines
This chapter reviews the historical development of radio frequency (RF) based accelerators, the recent progress toward compact lightweight designs, and the novel accelerator concepts in future hadron therapy systems. A charged particle beam therapy system consists of a number of fully integrated subsystems to deliver a precise dose to a patient promptly. Cyclotrons have been commonly used in isotope production and charged particle beam therapy. A synchrotron can provide rapid energy variation without maneuvering mechanical devices, unlike a cyclotron system that has to rely on a mechanical energy degrader and energy selection system to change the beam energy. A number of slow-cycle proton synchrotrons have been installed for clinical treatment. Heavy ion therapy synchrotrons follow the approach developed by National Institute of Radiological Sciences and GSI. Conventional RF-based accelerators, especially for heavy ions, can benefit from a compact laser-driven system providing ultrashort low-emittance ion sources as an injector for linacs, synchrotrons, or synchrocyclotrons.
- 24 May 2018
- Published by Taylor & Francis
- p. 225-248
Advances in Charged Particle Therapy Machines
This chapter reviews the historical development of radio frequency (RF) based accelerators, the recent progress toward compact lightweight designs, and the novel accelerator concepts in future hadron therapy systems. A charged particle beam therapy system consists of a number of fully integrated subsystems to deliver a precise dose to a patient promptly. Cyclotrons have been commonly used in isotope production and charged particle beam therapy. A synchrotron can provide rapid energy variation without maneuvering mechanical devices, unlike a cyclotron system that has to rely on a mechanical energy degrader and energy selection system to change the beam energy. A number of slow-cycle proton synchrotrons have been installed for clinical treatment. Heavy ion therapy synchrotrons follow the approach developed by National Institute of Radiological Sciences and GSI. Conventional RF-based accelerators, especially for heavy ions, can benefit from a compact laser-driven system providing ultrashort low-emittance ion sources as an injector for linacs, synchrotrons, or synchrocyclotrons.
- Open Access
- 1 April 2016
- Published by AIP Publishing in Physics of Plasmas
- Vol. 23 (4) , 043105
Ion-acoustic shocks with self-regulated ion reflection and acceleration
An analytic solution describing an ion-acoustic collisionless shock, self-consistently with the evolution of shock-reflected ions, is obtained. The solution extends the classic soliton solution beyond a critical Mach number, where the soliton ceases to exist because of the upstream ion reflection. The reflection transforms the soliton into a shock with a trailing wave and a foot populated by the reflected ions. The solution relates parameters of the entire shock structure, such as the maximum and minimum of the potential in the trailing wave, the height of the foot, as well as the shock Mach number, to the number of reflected ions. This relation is resolvable for any given distribution of the upstream ions. In this paper, we have resolved it for a simple “box” distribution. Two separate models of electron interaction with the shock are considered. The first model corresponds to the standard Boltzmannian electron distribution in which case the critical shock Mach number only insignificantly increases from (no ion reflection) to (substantial reflection). The second model corresponds to adiabatically trapped electrons. They produce a stronger increase, from to . The shock foot that is supported by the reflected ions also accelerates them somewhat further. A self-similar foot expansion into the upstream medium is described analytically.- 1 April 2016
- Published by AIP Publishing in Physics of Plasmas
- Vol. 23 (4) , 043105
Open AccessIon-acoustic shocks with self-regulated ion reflection and acceleration
An analytic solution describing an ion-acoustic collisionless shock, self-consistently with the evolution of shock-reflected ions, is obtained. The solution extends the classic soliton solution beyond a critical Mach number, where the soliton ceases to exist because of the upstream ion reflection. The reflection transforms the soliton into a shock with a trailing wave and a foot populated by the reflected ions. The solution relates parameters of the entire shock structure, such as the maximum and minimum of the potential in the trailing wave, the height of the foot, as well as the shock Mach number, to the number of reflected ions. This relation is resolvable for any given distribution of the upstream ions. In this paper, we have resolved it for a simple “box” distribution. Two separate models of electron interaction with the shock are considered. The first model corresponds to the standard Boltzmannian electron distribution in which case the critical shock Mach number only insignificantly increases from (no ion reflection) to (substantial reflection). The second model corresponds to adiabatically trapped electrons. They produce a stronger increase, from to . The shock foot that is supported by the reflected ions also accelerates them somewhat further. A self-similar foot expansion into the upstream medium is described analytically. - Open Access
Evidence for the sequestration of hydrogen-bearing volatiles towards the Moon’s southern pole-facing slopes
- Open Access
- 1 February 2013
- Published by IOP Publishing in New Journal of Physics
- Vol. 15 (2)
Generation of quasi-monoenergetic protons from thin multi-ion foils by a combination of laser radiation pressure acceleration and shielded Coulomb repulsion
- 1 February 2013
- Published by IOP Publishing in New Journal of Physics
- Vol. 15 (2)
Open AccessGeneration of quasi-monoenergetic protons from thin multi-ion foils by a combination of laser radiation pressure acceleration and shielded Coulomb repulsion
- 1 July 2012
- Published by AIP Publishing in Physics of Plasmas
- Vol. 19 (7) , 073116
Quasi-monoenergetic protons accelerated by laser radiation pressure and shocks in thin gaseous targets
Recent experiments and simulations have demonstrated effective CO2 laser acceleration of quasi-monoenergetic protons from thick gaseous hydrogen target (of thickness tens of laser wavelengths) via hole boring and shock accelerations. We present here an alternative novel acceleration scheme by combining laser radiation pressure acceleration with shock acceleration of protons in a thin gaseous target of thickness several laser wavelengths. The laser pushes the thin gaseous plasma forward while compressing it with protons trapped in it. We demonstrated the combined acceleration with two-dimensional particle-in-cell simulation and obtained quasi-monoenergetic protons ∼44 MeV in a gas target of thickness twice of the laser wavelength irradiated by circularly polarized CO2 laser with normalized laser amplitude .- 1 July 2012
- Published by AIP Publishing in Physics of Plasmas
- Vol. 19 (7) , 073116
Quasi-monoenergetic protons accelerated by laser radiation pressure and shocks in thin gaseous targets
Recent experiments and simulations have demonstrated effective CO2 laser acceleration of quasi-monoenergetic protons from thick gaseous hydrogen target (of thickness tens of laser wavelengths) via hole boring and shock accelerations. We present here an alternative novel acceleration scheme by combining laser radiation pressure acceleration with shock acceleration of protons in a thin gaseous target of thickness several laser wavelengths. The laser pushes the thin gaseous plasma forward while compressing it with protons trapped in it. We demonstrated the combined acceleration with two-dimensional particle-in-cell simulation and obtained quasi-monoenergetic protons ∼44 MeV in a gas target of thickness twice of the laser wavelength irradiated by circularly polarized CO2 laser with normalized laser amplitude .- 20 June 2012
- Published by Springer Nature
- p. 177-195
Laser Radiation Pressure Accelerator for Quasi-Monoenergetic Proton Generation and Its Medical Implications
- 20 June 2012
- Published by Springer Nature
- p. 177-195
Laser Radiation Pressure Accelerator for Quasi-Monoenergetic Proton Generation and Its Medical Implications
- 1 December 2011
- Published by AIP Publishing in Physics of Plasmas
- Vol. 18 (12) , 123105
Energetics and energy scaling of quasi-monoenergetic protons in laser radiation pressure acceleration
Theoretical and computational studies of the ion energy scaling of the radiation pressure acceleration of an ultra-thin foil by short pulse intense laser irradiation are presented. To obtain a quasi-monoenergetic ion beam with an energy spread of less than 20%, two-dimensional particle-in-cell simulations show that the maximum energy of the quasi-monoenergetic ion beam is limited by self-induced transparency at the density minima caused by the Rayleigh-Taylor instability. For foils of optimal thickness, the time over which Rayleigh-Taylor instability fully develops and transparency occurs is almost independent of the laser amplitude. With a laser power of about one petawatt, quasi-monogenetic protons with 200 MeV and carbon ions with 100 MeV per nucleon can be obtained, suitable for particle therapy applications.
- 1 December 2011
- Published by AIP Publishing in Physics of Plasmas
- Vol. 18 (12) , 123105
Energetics and energy scaling of quasi-monoenergetic protons in laser radiation pressure acceleration
Theoretical and computational studies of the ion energy scaling of the radiation pressure acceleration of an ultra-thin foil by short pulse intense laser irradiation are presented. To obtain a quasi-monoenergetic ion beam with an energy spread of less than 20%, two-dimensional particle-in-cell simulations show that the maximum energy of the quasi-monoenergetic ion beam is limited by self-induced transparency at the density minima caused by the Rayleigh-Taylor instability. For foils of optimal thickness, the time over which Rayleigh-Taylor instability fully develops and transparency occurs is almost independent of the laser amplitude. With a laser power of about one petawatt, quasi-monogenetic protons with 200 MeV and carbon ions with 100 MeV per nucleon can be obtained, suitable for particle therapy applications.