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Publication
Featured researches published by Jong Seo Chai.
Review of Scientific Instruments | 2008
Dong Hyun An; I. S. Jung; J. Kang; Hong Suk Chang; B. H. Hong; S. Hong; M. Y. Lee; Y. Kim; T. K. Yang; Jong Seo Chai
The cold-cathode-type Penning ion gauge (PIG) ion source for the internal ion source of KIRAMS-13 cyclotron has been used for generation of negative hydrogen ions. The dc H-beam current of 650 microA from the PIG ion source with the Dee voltage of 40 kV and arc current of 1.0 A is extrapolated from the measured dc extraction beam currents at the low extraction dc voltages. The output optimization of PIG ion source in the cyclotron has been carried out by using various chimneys with different sizes of the expansion gap between the plasma boundary and the chimney wall. This paper presents the results of the dc H-extraction measurement and the expansion gap experiment.
Review of Scientific Instruments | 2008
Kun Uk Kang; Dong Hyun An; Hong Suk Chang; Jong Seo Chai
KIRAMS-30 cyclotron has been developed and implemented for radio isotope production. For the purpose of producing negative hydrogen ions and low energy beam injection to the central region of KIRAMS-30, 10 mA H(-) multicusp ion source with beam kinetic energies in the 20-30 keV range and the normalized 4 rms emittance less than 1 mm mrad was installed. The optimized ion source operating condition is presented and the correlation between the extracted beam current and ion source parameters is described for the performance enhancement of the ion source.
Archive | 2004
Dong Hyun An; Jong Seo Chai; Hong Suk Chang; Bong Hwan Hong; Seong Seok Hong; Joonsun Kang; Yu-Seok Kim; Chong Shik Park; Tae Keun Yang
Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms | 2005
Bong Hwan Hong; Dong Hyun An; Jong Seo Chai; Hong Suk Chang; Min Goo Hur; In Su Jung; Sang Wook Kim; Yu Seok Kim; Tae Keun Yang
Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms | 2007
In Su Jung; Dong Hyun An; Bong Hwan Hong; Min Goo Hur; Joon Sun Kang; Hong Suk Chang; Tea Gun Yang; Min Young Lee; Seong Seok Hong; Yu Seuk Kim; Jong Seo Chai; Key Ho Kwon
Archive | 2004
Dong Hyun An; Jong Seo Chai; Hong Suk Chang; Bong Hwan Hong; Seong Seok Hong; Joonsun Kang; Yu-Seok Kim; Chong Shik Park; Tae Keun Yang
Archive | 2004
Hong Suk Chang; Dong Hyun An; Jong Seo Chai; Bong Hwan Hong; Seong Seok Hong; Joon Sun Kang; Yu Seok Kim; Jung Hwan Kim; Sang Wook Kim; Yong Lee; Kyung Eun Lim; Chong Shik Park; Tae Keun Yang; Yong Ki Yun; Cyclotron Description
Archive | 2013
Kun Uk Kang; Dong Hyun An; Hong Suk Chang; Jong Seo Chai
Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms | 2007
Bong Hwan Hong; Jong Seo Chai; Min Goo Hur; Hong Suk Chang; Joon Sun Kang; Hyung Hee Cho; Kyung Min Kim
Archive | 2006
In Su Jung; Dong Hyun An; Bong Hwan Hong; Joon Sun Kang; Min Goo Hur; Hong Suk Jang; Tae Gun Yang; Min Young Lee; Sung Seok Hong; Yu Seok Kim; Jong Seo Chai