Development of the C6+ laser ablation ion source for the KEK digital accelerator

Munemoto, Naoya; Takayama, Ken; Takano, S.; Okamura, M.; Kumaki, Masahumi

doi:10.1063/1.4862211

Cited by 12 publications

(7 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A ring lattice with a large flat dispersion function has been designed for this technique. Extensive work to realize this scheme has been performed at KEK, Tsukuba, Japan since 2013, including an experimental demonstration of the fast-cycling induction synchrotron [2], an advanced beam-handling technique using the barrier bucket [3], and a laser-ablation ion source (LAIS) capable of generating fully stripped carbon ions [4,5].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Munemoto

Takano

Kadokura

et al. 2017

Phys. Rev. Accel. Beams

View full text Add to dashboard Cite

Fully stripped carbon ions generated in a laser-ablation ion source are directly injected into a smallscale induction synchrotron. Carbon-ion beams of C 6þ , C 5þ , and C 4þ are trapped in the barrier bucket. Beam properties, such as the momentum spread and beam lifetime in the low-energy ring, are measured and discussed in relation to the essential characteristics required in a carbon driver for future carbon therapies.

show abstract

Section: Introductionmentioning

confidence: 99%

“…LAIS research was initiated in 2013 at KEK. A LAIS driven by a small Nd-YAG laser of 600 mJ with a graphite target was completed in 2016 [4]. To simulate the key features of the future hadron driver experimentally, the LAIS was integrated with the KEK-DA, where a C 6þ bunch is captured in the barrier bucket for its lifetime.…”

Section: Introductionmentioning

confidence: 99%

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

Munemoto

Takano

Kadokura

et al. 2017

Phys. Rev. Accel. Beams

View full text Add to dashboard Cite

show abstract

“…The ion source is embedded in the 200-kV high-voltage platform (HVP). A laser ablation ion source [9] is the most promising candidate for fully stripped carbon ions. A hadron beam, which is extracted from the HVP and propagates through the minimum beam transport line, is immediately injected in one turn by the electrostatic injection kicker, which is turned off by a matrix array of solid-state switching elements instead of the usual thyratron vacuum tube [10].…”

Section: Lattice Design With Large Flat Dispersion Function Andmentioning

confidence: 99%

Compact hadron driver for cancer therapies using continuous energy sweep scanning

Wah

Monma

Adachi

et al. 2016

Phys. Rev. Accel. Beams

Self Cite

View full text Add to dashboard Cite

A design of a compact hadron driver for future cancer therapies based on the induction synchrotron concept is presented. To realize a slow extraction technique in a fast-cycling synchrotron, which allows energy sweep beam scanning, a zero momentum-dispersion DðsÞ region and a high flat DðsÞ region are necessary. The proposed design meets both requirements. The lattice has two-fold symmetry with a circumference of 52.8 m, a 2-m dispersion-free straight section, and a 3-m-long large flat dispersion straight section. Assuming a 1.5-T bending magnet, the ring can deliver heavy ions (200 MeV=u) at 10 Hz. A beam fraction is dropped from the barrier bucket at the desired timing, and the increasing negative momentum deviation of this beam fraction becomes large enough for the fraction to fall in the electrostatic septum extraction gap, which is placed at the large DðsÞ region. The programmed energy sweep extraction enables scanning beam irradiation on a cancer site in depth without an energy degrader, avoiding the production of secondary particles and the degradation of emittance. Details of the lattice parameters and computer simulations for slow extraction are discussed. An example extraction scenario is presented. Qualities of the spilled beam such as emittance and momentum spread are discussed, as well as necessary functions and parameters required for the extraction system.

show abstract

“…Pulsed laser ablation has been utilized as a source of positive and negative ions which can be singly or multiply charged [1][2][3]. One application of nanosecond laser ablation as an ion source is the extraction of highly charged ions such as C 6+ produced by direct laser injection on the target [4].…”

Section: Introductionmentioning

confidence: 99%

Mass distributions of ions extracted from target cavity confined plasmas produced by nanosecond laser pulses

Hernandez

Wada

2022

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Ion and electron current signals produced from a solid graphite target under 1064 nm nanosecond laser pulse irradiation were investigated. A cavity is formed by laser incidence at the center of the target surface at 10 Hz repetition rate while being rotated along its axis. Ion mass distributions were recorded via a time-of-flight spectrum coupled with a detector assembly attached along the propagation axis. Peak shifts towards slower times were observed for increasing number of pulses. The effect of magnetic detection on the ion current signals is investigated, and showed significant peak shifts for 20 GW/cm 2 laser power density.

show abstract

Development of the C6+ laser ablation ion source for the KEK digital accelerator

Cited by 12 publications

References 8 publications

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

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

Compact hadron driver for cancer therapies using continuous energy sweep scanning

Mass distributions of ions extracted from target cavity confined plasmas produced by nanosecond laser pulses

Contact Info

Product

Resources

About