First charge breeding results at CARIBU EBIS

Kondrashev, S.; Barcikowski, A.; Dickerson, Clayton; Ostroumov, P. N.; Sharamentov, S.I.; Vondrasek, R.; Pikin, A.

doi:10.1063/1.4905400

Cited by 7 publications

(6 citation statements)

References 3 publications

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“…After completion of baking and several weeks of pumping the ion gauge readings were 1.3 •10 -10 Torr at e-gun chamber and 4.5•10 -10 Torr near the collector with the electron beam switched off. This is a significant improvement as compared with the previous data 19 . The residual pressure depends on the electron beam current and its duty cycle.…”

Section: A Ebis Vacuum Systemmentioning

confidence: 53%

“…These experiments were interrupted several times for extended periods of a month or longer for the improvement of the EBIS sub-systems. The first charge breeding results of the cesium beam were reported at a recent symposium on electron beam ion sources and traps 19 . Significant performance improvements have been achieved in the past year as is discussed throughout the content of this paper.…”

Section: Ebis Layout and Operational Parametersmentioning

confidence: 99%

“…The 3D model and general view of the EBIS at the off-line location are shown in Fig.3 and 4 respectively. The commissioning of the EBIS sub-systems 13,14 and beam dynamics studies were discussed in earlier publications 10 . Current operational parameters of the EBIS are listed in Table 1 together with possible ultimate parameters.…”

Section: Ebis Layout and Operational Parametersmentioning

confidence: 99%

“…Many additional novel design features of the CARIBU EBIS CB are described in the following section and more details are given in our previous publications 10,11 . Off-line commissioning of sub-systems and first charge breeding measurements were already reported 12,13 . This paper discusses results of charge breeding experiments with the external singly charged cesium source.…”

Section: Introductionmentioning

confidence: 99%

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Fast and efficient charge breeding of the Californium rare isotope breeder upgrade electron beam ion source

Ostroumov

Barcikowski

Dickerson

et al. 2015

Review of Scientific Instruments

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The Electron Beam Ion Source (EBIS), developed to breed Californium Rare Isotope Breeder Upgrade (CARIBU) radioactive beams at Argonne Tandem Linac Accelerator System (ATLAS), is being tested off-line. A unique property of the EBIS is a combination of short breeding times, high repetition rates, and a large acceptance. Overall, we have implemented many innovative features during the design and construction of the CARIBU EBIS as compared to the existing EBIS breeders. The off-line charge breeding tests are being performed using a surface ionization source that produces singly charged cesium ions. The main goal of the off-line commissioning is to demonstrate stable operation of the EBIS at a 10 Hz repetition rate and a breeding efficiency into single charge state higher than 15%. These goals have been successfully achieved and exceeded. We have measured (20% ± 0.7%) breeding efficiency into the single charge state of 28+ cesium ions with the breeding time of 28 ms. In general, the current CARIBU EBIS operational parameters can provide charge breeding of any ions in the full mass range of periodic table with high efficiency, short breeding times, and sufficiently low charge-to-mass ratio, 1/6.3 for the heaviest masses, for further acceleration in ATLAS. In this paper, we discuss the parameters of the EBIS and the charge breeding results in a pulsed injection mode with repetition rates up to 10 Hz.

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Section: A Ebis Vacuum Systemmentioning

confidence: 53%

Section: Ebis Layout and Operational Parametersmentioning

confidence: 99%

Section: Ebis Layout and Operational Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fast and efficient charge breeding of the Californium rare isotope breeder upgrade electron beam ion source

Ostroumov

Barcikowski

Dickerson

et al. 2015

Review of Scientific Instruments

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“…The first off-line charge breeding results were obtained in May 2014 [36]. With the injection of a Cs + beam, a charge breeding efficiency of 10% into 14+ was realized with a modest solenoid field (4 T) and electron beam density (170 A/cm 2 ).…”

Section: Anl Ebis Performancementioning

confidence: 99%

On-line charge breeding using ECRIS and EBIS

Vondrasek

2016

Nuclear Instruments and Methods in Physics Research Section B:

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The efficient and rapid production of a high-quality, pure beam of highly charged ions is at the heart of any radioactive ion beam facility. Whether an electron cyclotron resonance (ECR) ion source or an electron beam ion source (EBIS) is used to produce these highly charged ions, their operating characteristics will set the boundaries on the range of experiments which can be performed. In addition, time structure and duty cycle have to be considered when defining the operating parameters of the accelerator system as a whole. At Argonne National Laboratory (ANL), an ECR charge breeder was developed as part of the Californium Rare Ion Breeder Upgrade (CARIBU) program. The charge breeding efficiency and high charge state production of the source is at the forefront of ECR charge breeders, but its overall performance as part of the accelerator system is limited by pervasive background and relatively long breeding times. As such, an EBIS charge breeder has been developed and is running in an off-line configuration. It has already demonstrated good breeding efficiencies, shorter residence times, and reduced background and is scheduled to replace the ECR charge breeder in late 2015. The resultant change in duty cycle and time structure necessitates changes to the overall operation of the facility. The experiences with these breeders, as well as from several other facilities which already utilize an ECR or EBIS for charge breeding, help to define the operational characteristics of each technologytheir strengths, their weaknesses, and the possible paths to improvement.

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The TwinEBIS setup: Machine description

Breitenfeldt

Mertzig

Pitters

et al. 2017

Nuclear Instruments and Methods in Physics Research Section A:

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International audienceTwinEBIS is an Electron Beam Ion Source (EBIS) recently made operational at CERN. The device is similar in construction to the REXEBIS charge breeder operating at the ISOLDE facility. After relocation of the solenoid from the Manne Siegbahn Laboratory (MSL) Stockholm, TwinEBIS was commissioned at CERN and serves as a test bench dedicated to manipulation of low-energy highly charged ions. In this paper we give an overview of the setup and present advanced numerical simulations of the electron optics. In addition, the alignment procedure of the solenoid magnetic field is described and measurement results are presented. Results from cathode investigations, electron beam tests and ion extraction modulation are presented in a follow-up paper

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First charge breeding results at CARIBU EBIS

Cited by 7 publications

References 3 publications

Fast and efficient charge breeding of the Californium rare isotope breeder upgrade electron beam ion source

Fast and efficient charge breeding of the Californium rare isotope breeder upgrade electron beam ion source

On-line charge breeding using ECRIS and EBIS

The TwinEBIS setup: Machine description

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