摘要:

Experimental study of the BNL Electron Beam Test Stand (EBTS), which is a prototype of the Relativistic Heavy Ion Collider (RHIC) Electron Beam Ion Source (EBIS), is currently underway. The basic physics and engineering aspects of a high current EBIS implemented in EBTS are outlined and construction of its main systems is presented. Efficient transmission of a 10 A electron beam through the ion trap has been achieved. Experimental results on generation of multiply charged ions with both continuous gas and external ion injection confirm stable operation of the ion trap. ©2001 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.1390095

出版商:AIP    

年代:1901

数据来源: AIP

摘要:

The Stockholm electron beam ion source CRYSIS has since 1987 been used for the production of ions with charges in the region 1+ to 60+ for various experiments at low energies as well as for experiments in the storage ring CRYRING. A short summary of these experiments is given. The highly charged ions are produced by electron bombardment of species, either by directly introducing a monoisotopic or almost monoisotopic gas or singly charged isotope separated ions into CRYSIS. The singly charged ions are produced in a plasma ion source, CHORDIS, that can operate with gases, solid material evaporated in an oven or used in a sputtering mode. In this way highly charged ions of practically any element can be produced, even isotopes with a low abundance. The mass selection is done with a 0.5 meter radius doubly focusing magnet that ensures isotopically pure beams even for the heaviest elements. A summary is given of the elements and charge states so far delivered to users. ©2001 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.1390096

出版商:AIP    

年代:1901

数据来源: AIP

摘要:

A warm electron beam ion source (EBIS) for the production of multiply charged ions for injection into the heavy-ion storage ring ASTRID (Arhus STorage RIng Denmark) at the Institute of Physics and Astronomy, University of Aarhus, has now become operational. The aim is to produce moderately charged ions in amounts which match the requirements of ASTRID. For elements lighter than oxygen, ions of all charge states can be produced with sufficient intensity for injection. The same is true for heavier ions with charge states up to ∼15. ©2001 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.1390097

出版商:AIP    

年代:1901

数据来源: AIP

摘要:

Promising results are currently being obtained on the BNL Electron Beam Test Stand (EBTS), which is a prototype for the Relativistic Heavy Ion Collider (RHIC) EBIS. Based on the present results, a proposal has been made regarding the general design of the RHIC EBIS. During the next year experiments will be made to investigate physics issues and beam properties important to the detailed design of the RHIC EBIS. Below we have outlined some of the physics issues to be explored experimentally, beam diagnostics that will be employed, and hardware modifications that are desired to go from the prototype stage to the RHIC EBIS. ©2001 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.1390098

出版商:AIP    

年代:1901

数据来源: AIP

摘要:

A design proposal for an Electron Beam Ion Source (EBIS) for the ion pre-injector for the Large Hadron Collider (LHC) is presented. The LHCEBIS would produce lead ions, as well as lighter ions, that are directly injected into and further accelerated in an RFQ/LINAC arrangement. The source would operate with a repetition rate of 0.8 Hz, and the extracted yield is estimated to1.6⋅109Pb 54+per pulse.Using fast extraction, the extraction time can be less than 10&mgr;s, possibly allowing single-turn injection into the PS Booster. © 2001 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.1390099

出版商:AIP    

年代:1901

数据来源: AIP

摘要:

The REXEBIS is an Electron Beam Ion Source (EBIS) developed particularly for charge breeding of rare and short-lived isotopes produced at ISOLDE for the REX-ISOLDE post accelerator. Bunches of singly charged radioactive ions are injected into the EBIS and charge bred to a charge-to-mass ratio of approximately 1/4 and thereafter extracted and injected into a short LINAC. This novel concept, employing a Penning trap to bunch and cool the ions from an on-line mass separator prior to charge breeding in an EBIS, results in an efficient and compact system. In this article the final REXEBIS design is presented together with results from the first tests. ©2001 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.1390100

出版商:AIP    

年代:1901

数据来源: AIP

摘要:

This work deals with the “charge state breeder” that will be tested at INFN Laboratory of Bari (Italy). The breeder, based on the Electron Beam Ion Source (EBIS) scheme, is designed for applications in Radioactive Ion Beam (RIB) production facilities based on the Isotope Separation On-Line (ISOL) method in the framework of the SPES project of the INFN LNL laboratory (Legnaro). Some modifications with respect to the classical EBIS have been proposed to increase the containment efficiency. The insertion in the ion chamber of a RF-Quadrupole, aiming to filtering the unwanted masses, is the most relevant change with respect to the classical EBIS. The breeder design and numerical simulation results of the electron and ion beam propagation are reported. ©2001 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.1390101

出版商:AIP    

年代:1901

数据来源: AIP

摘要:

In 1997, we have constructed a newly designed, high-energy EBIT in Tokyo to study the physics of highly charged ions(HCIs) [1]. In the first stage of the operation, our experimental activity has been concentrated mainly on the spectroscopy of HCIs in the trap. Recently, we have started to use the extracted ions from the trap and to investigate the HCI-interaction with matters. In this report, an overview of the Tokyo-EBIT and some results with it are shown. ©2001 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.1390102

出版商:AIP    

年代:1901

数据来源: AIP

摘要:

In order to investigate the use of the self pinching effect of partially neutralized relativistic electron beams for the production of highly charged ions an XEBIST (cross-over electron beam ion source and trap) has been constructed. First experiments demonstrate that it is possible to increase the effective current density in the waist of the electron beam at 22 keV energy and 30 mA current by a factor of 10, using self pinching. The crucial role of a low emittance and of proper beam matching in order to achieve an increase in current density by the self focusing has been demonstrated by simulations as well as by experiments. ©2001 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.1390103

出版商:AIP    

年代:1901

数据来源: AIP

摘要:

The reflex mode of EBIS operation can provide a stable state of accumulating electrons at some conditions, which was first, observed in 1994 and later was named the electron string. A short review of studies of the electron string formation and decay and its features and of the string mode of EBIS operation, which were performed in JINR (Dubna), MSL (Stockholm) and in IAP (Frankfurt/M) since the EBIS Symposium ’94, when the first results were reported, is presented in this paper. ©2001 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.1390104

出版商:AIP    

年代:1901

数据来源: AIP