First experiments with the Dresden EBIS-SC

A gas cell apparatus to measure charge exchange cross sections for charge state- and energy-resolved ion beams with neutrals is described. The design features a short well-defined interaction region required for beams of multicharged ions with high cross sections. Our method includes measuring the beam transmission at four different neutral pressures and extracting the cross section from the slope of a beam loss vs pressure plot. The design and procedure were tested for Ar interacting with neutral Ar gas over the incident ion energy range of 1.0-5.0 keV. The charge exchange cross sections agree well with previous complementary measurement techniques.

Section: Introductionmentioning

confidence: 99%

A gas cell apparatus for measuring charge exchange cross sections with multicharged ions

Bromley

Fox

Sosolik

et al. 2018

“…10 The drift tube section consists of 3-7 drift tubes with an overall length of 20 cm and is located in a magnetic field of up to 6 T.…”

Section: Superconducting Electron Beam Ion Sources -Dresdenmentioning

confidence: 99%

Electron beam ion sources for use in second generation synchrotrons for medical particle therapy

Zschornack

Ritter

Schmidt³

et al. 2013

Cyclotrons and first generation synchrotrons are the commonly applied accelerators in medical particle therapy nowadays. Next generation accelerators such as Rapid Cycling Medical Synchrotrons (RCMS), direct drive accelerators, or dielectric wall accelerators have the potential to improve the existing accelerator techniques in this field. Innovative accelerator concepts for medical particle therapy can benefit from ion sources which meet their special requirements. In the present paper we report on measurements with a superconducting Electron Beam Ion Source, the Dresden EBIS-SC, under the aspect of application in combination with RCMS as a well proven technology. The measurements indicate that this ion source can offer significant advantages for medical particle therapy. We show that a superconducting EBIS can deliver ion pulses of medically relevant ions such as protons, C(4 +) and C(6 +) ions with intensities and frequencies required for RCMS [S. Peggs and T. Satogata, "A survey of Hadron therapy accelerator technology," in Proceedings of PAC07, BNL-79826- 2008-CP, Albuquerque, New Mexico, USA, 2007; A. Garonna, U. Amaldi et al., "Cyclinac medical accelerators using pulsed C(6 +)/H2(+) ion sources," in Proceedings of EBIST 2010, Stockholm, Sweden, July 2010]. Ion extraction spectra as well as individual ion pulses have been measured. For example, we report on the generation of proton pulses with up to 3 × 10(9) protons per pulse and with frequencies of up to 1000 Hz at electron beam currents of 600 mA.

“…have cooperated to develop an EBIS. 18 Such combined uses are also expected to allow injection into the rapid cycling medical synchrotron developed by Brookhaven National Laboratory (BNL) in Upton, New York. 19 If the acceleration voltage is high enough from the ion sources, it is not necessary to install an injector.…”

Section: Developments For Future Charged-particle Radiotherapymentioning

confidence: 99%

“…From recent Japanese statistics, a tendency to increase use of in vivo diagnostics with 18 Fe or 99 Tc instead of in vitro diagnostics with 125 I or 59 Fe is seen. 25 It comes from the replacement by non-radioactive probes like fluorescent compounds in the case of in vitro diagnostics.…”

Section: Radioisotope Productionmentioning

confidence: 99%

See 1 more Smart Citation

A review of ion sources for medical accelerators (invited)

Muramatsu¹,

Kitagawa²

2012

There are two major medical applications of ion accelerators. One is a production of short-lived isotopes for radionuclide imaging with positron emission tomography and single photon emission computer tomography. Generally, a combination of a source for negative ions (usually H- and/or D-) and a cyclotron is used; this system is well established and distributed over the world. Other important medical application is charged-particle radiotherapy, where the accelerated ion beam itself is being used for patient treatment. Two distinctly different methods are being applied: either with protons or with heavy-ions (mostly carbon ions). Proton radiotherapy for deep-seated tumors has become widespread since the 1990s. The energy and intensity are typically over 200 MeV and several 1010 pps, respectively. Cyclotrons as well as synchrotrons are utilized. The ion source for the cyclotron is generally similar to the type for production of radioisotopes. For a synchrotron, one applies a positive ion source in combination with an injector linac. Carbon ion radiotherapy awakens a worldwide interest. About 6000 cancer patients have already been treated with carbon beams from the Heavy Ion Medical Accelerator in Chiba at the National Institute of Radiological Sciences in Japan. These clinical results have clearly verified the advantages of carbon ions. Heidelberg Ion Therapy Center and Gunma University Heavy Ion Medical Center have been successfully launched. Several new facilities are under commissioning or construction. The beam energy is adjusted to the depth of tumors. It is usually between 140 and 430 MeV/u. Although the beam intensity depends on the irradiation method, it is typically several 108 or 109 pps. Synchrotrons are only utilized for carbon ion radiotherapy. An ECR ion source supplies multi-charged carbon ions for this requirement. Some other medical applications with ion beams attract developer's interests. For example, the several types of accelerators are under development for the boron neutron capture therapy. This treatment is conventionally demonstrated by a nuclear reactor, but it is strongly expected to replace the reactor by the accelerator. We report status of ion source for medical application and such scope for further developments.