Recent Progress in High Frequency Electron Cyclotron Resonance Ion Sources

Hitz, D.

doi:10.1016/s1076-5670(06)44001-5

Cited by 20 publications

(32 citation statements)

References 104 publications

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“…1 In the past decade, the performance of ion source was improved dramatically. For example, the beam intensity of Ar 8+ was increased from several 100 eA to 2 emA.…”

Section: Introductionmentioning

confidence: 99%

Measurement of plasma potential of liquid-He-free superconducting electron cyclotron resonance ion source

Higashijima

Takai

Nakagawa

et al. 2008

Review of Scientific Instruments

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The plasma potential of liquid-He-free superconducting electron cyclotron resonance ion source was measured as a function of minimum strength of mirror magnetic field (B(min)) and gas pressure with the method based on the retarding electric field. We observed that the plasma potential decreased with increasing B(min) up to 0.5 T and then gradually increased again. The plasma potential increased with increasing gas pressure. When we add the O(2) gas to the Ar plasma (gas mixing method), plasma potential gradually decreased with increasing the O(2) gas pressure.

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“…1 In the past decade, the performance of ion source was improved dramatically. For example, the beam intensity of Ar 8+ was increased from several 100 eA to 2 emA.…”

Section: Introductionmentioning

confidence: 99%

Measurement of plasma potential of liquid-He-free superconducting electron cyclotron resonance ion source

Higashijima

Takai

Nakagawa

et al. 2008

Review of Scientific Instruments

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“…The 24 GHz transmission line and rf coupling system to SECRAL are similar to that developed at SERSE source. 19,20 The 24 GHz transmission line from the gyrotron cabinet to the SECRAL source consists of arc detector, directional coupler, polarizer, mode converter from T 02 to T 01 , mode filter, compensator, dc breaker, 90°c orrugated bend, and bore-nitride microwave window, as shown in Fig. 4.…”

Section: Secral Preliminary Test Results With a 24 Ghz/7 Kw Gyrotmentioning

confidence: 99%

New development of advanced superconducting electron cyclotron resonance ion source SECRAL (invited)

Zhao

Sun

Zhang

et al. 2010

Review of Scientific Instruments

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Superconducting electron cyclotron resonance ion source with advance design in Lanzhou (SECRAL) is an 18-28 GHz fully superconducting electron cyclotron resonance (ECR) ion source dedicated for highly charged heavy ion beam production. SECRAL, with an innovative superconducting magnet structure of solenoid-inside-sextupole and at lower frequency and lower rf power operation, may open a new way for developing compact and reliable high performance superconducting ECR ion source. One of the recent highlights achieved at SECRAL is that some new record beam currents for very high charge states were produced by 18 GHz or 18+14.5 GHz double frequency heating, such as 1 e microA of (129)Xe(43+), 22 e microA of (209)Bi(41+), and 1.5 e microA of (209)Bi(50+). To further enhance the performance of SECRAL, a 24 GHz/7 kW gyrotron microwave generator was installed and SECRAL was tested at 24 GHz. Some promising and exciting results at 24 GHz with new record highly charged ion beam intensities were produced, such as 455 e microA of (129)Xe(27+) and 152 e microA of (129)Xe(30+), although the commissioning time was limited within 3-4 weeks and rf power only 3-4 kW. Bremsstrahlung measurements at 24 GHz show that x-ray is much stronger with higher rf frequency, higher rf power. and higher minimum mirror magnetic field (minimum B). Preliminary emittance measurements indicate that SECRAL emittance at 24 GHz is slightly higher that at 18 GHz. SECRAL has been put into routine operation at 18 GHz for heavy ion research facility in Lanzhou (HIRFL) accelerator complex since May 2007. The total operation beam time from SECRAL for HIRFL accelerator has been more than 2000 h, and (129)Xe(27+), (78)Kr(19+), (209)Bi(31+), and (58)Ni(19+) beams were delivered. All of these new developments, the latest results, and long-term operation for the accelerator have again demonstrated that SECRAL is one of the best in the performance of ECR ion source for highly charged heavy ion beam production. Finally the future development of SECRAL will be presented.

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“…make it general, we now consider the typical magnetostatic profile relative to the case in which a single monochromatic wave at the frequency of 28 GHz is used to supply the source [3,[13][14][15][16]. Typical magnetic field profile on the z axis, relative to the case in which an electromagnetic wave at the frequency of 28 GHz is applied to a high-performance ion source.…”

Section: Parametermentioning

confidence: 99%

“…Typical magnetic field profile on the z axis, relative to the case in which an electromagnetic wave at the frequency of 28 GHz is applied to a high-performance ion source. Then, by taking into account the power values commonly required to feed the cavity in the considered case, suitable dimensions for it can be chosen as length L C = 0.6 m and radius a C = 0.08 m [3,[13][14][15][16]. Practical rules for the ion source operation [1][2][3] require that there be a plasma chamber large enough to obtain a suitable and not-too-high average power density within it.…”

Section: Parametermentioning

confidence: 99%

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Study of the asymmetric magnetic field confining the plasma in an experimental ECR set-up

Barbarino

Consoli²

2009

J. Plasma Phys.

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The detailed description of the asymmetric magnetostatic field, used to confine a plasma in a typical electron cyclotron resonance set-up, and of the related resonance surface, associated with an electromagnetic wave feeding the source, has been obtained by means of exact expressions, employing complete elliptic integrals. This field representation is necessary in the studies regarding particles magnetically confined in these apparatuses.

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Recent Progress in High Frequency Electron Cyclotron Resonance Ion Sources

Cited by 20 publications

References 104 publications

Measurement of plasma potential of liquid-He-free superconducting electron cyclotron resonance ion source

Measurement of plasma potential of liquid-He-free superconducting electron cyclotron resonance ion source

New development of advanced superconducting electron cyclotron resonance ion source SECRAL (invited)

Study of the asymmetric magnetic field confining the plasma in an experimental ECR set-up

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