Lecture 1 (9:10 – 10:00 @ Multifunction Room)

Status & Prospect of PLS-II and PAL-XFEL at Pohang Accelerator Lab

Speaker: Moohyun Cho

Lecture 2 (10:00 – 10:50 @ Multifunction Room)

The construction and commissioning of the TPS

Speaker: June-Rong Chen

Status & Prospect of PLS-II and PAL-XFEL at Pohang Accelerator Lab
Abstract:
25 years has been passed since the beginning of the user operation of PLS (Pohang Light Source). PLS started as a 2-GeV light source, and upgraded to 2.5-GeV in 2002 with very little change in machine configuration. From 2009 to 2011 PLS had gone through major upgrade with the support of Korean government funding, and reborn as PLS-II. We used the existing storage ring building (fixed circumference of ~280m), and energy-up to 3 GeV, beam current-up to 400 mA with 3 sets of 500MHz SC-rf-cavities, 20 ID sections with 14 sets of in-vacuum type ID’s, and the lattice has been changed to DBA from TBA with 5.8 mm-mrad emittance.　Due to the on-going user service, we had to minimize the machine down time by making very tight work plan for uninstall & installation, which was carried out in 6 months period except commissioning.　30 beamlines are reinstalled with standardization of common utilities matched to the PLS-II lattice.

The user researches have been mostly basic sciences from universities and research labs.　We launched a new program to promote industrial usage of the synchrotron lights with the quick service of the beam time arrangement and result analysis.

Another new major project at PAL is the construction of PAL-XFEL within the boundary of existing PAL site. The government approval was made at the end of 2010 with the total budget of ~$400M.. With much discussion and budget profiling the design was fixed to make 10 GeV S-band normal conducting Cu structure linac based XFEL with series of 5m long out-vacuum undulators. XFEL output will be 0.1nm hard X-rays as a shortest wavelength with the maximum pulse repetition rate of 60 Hz. We have close collaboration with SLAC to receive important X-band and diagnostic components, and also with Spring-8 and DESY for the XFEL detector development together with the beamline construction.　The installation of the XFEL machine components and the utility are completed as of Dec.31, 2015. We start e-beam commissioning form the 1st week of January, 2016.

In this talk the status and prospect of the PLS-II synchrotron light source and the PAL-XFEL project at Pohang Accelerator Lab are presented.

※PLS-II operation and PAL-FEL construction project are supported by MISP, S.Korea and POSTECH. 

The construction and commissioning of the TPS
Abstract:
The 3 GeV Taiwan Photon Source (TPS) has been successfully constructed and passed the first commissioning stage. A current of >500mA has been achieved recently. Numerous considerations for this low emittance machine have been emphasized during the design and construction stage. In this report, the major construction and commissioning results are depicted. Particularly, the vacuum related issues, which influence the beam performance, are most focused.　

Speaker:
Moohyun Cho
Professor, Department of Physics, POSTECH
San 31 Hyoja-Dong, Pohang, 37673 S. Korea
Tel: +82-54-279-2002, M.P: +82-10-3811-2075 
e-mail: mhcho@postech.ac.kr
web; http://www-ph.postech.ac.kr/~mhcho/ 
Birth Date:     October 1, 1954
Nationality:     Republic of Korea 
Home Address:　Kyosoo Apt. 7-1703, Jigok-dong, Pohang 37673 S. Korea
■ Education:　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 
Ph.D. (Oct. 1988): Nuclear Eng. & Eng. Physics Dept, Univ. of Wisconsin-Madison, U.S.A. 
BS (Feb. 1977): Nuclear Engineering, Seoul National University, Seoul, Korea
■ Experiences & Achievements:　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　
    Sep. 2015     - present     Exec. Vice president & Provost, POSTECH
    Sep. 2011     - Aug. 2015    Director of PAL(Pohang Accelerator Lab), POSTECH
    Sep. 2009     - Aug. 2011    Dean of Research Affairs, POSTECH, Pohang, Korea
    May 2010    - May 2012    Member of S&T Policy Advisory Committee of MEST, Korea (National Space & Big-Science programs)
    Feb. 2008    - Dec. 2009    Division Director of Nuclear Fusion Program, National Research Foundation (2 year full-time appointment)
    Jan. 2009     - Dec. 2010    Vice president of the Korean Physical Society (KPS)
    Apr. 2007    - Apr. 2010    Member of ITER MAC (Management Advisory Committee)
    Dec. 1995    - Aug. 2007    KSTAR project (construction of the SC-Coil Power Supply System and the Microwave Current Drive Systems)
    Jun. 2002     -     May. 2004    Chairman of Division of Plasma Physics, KPS, Korea
    Mar. 2000    -    Feb. 2001    Visiting Scientist, APS, Argonne National Lab, U.S.A.
    Sept. 1989    -    Sept. 1998    Pohang Light Source (PLS) Project (worked on 2-GeVLinac construction)
    Aug. 1989    -     present    Professor of department of Physics, POSTECH
■ Field of Research Interest:　　　　　　　　　　　　　　　　　　　　　　　　　　 
    Experimental study of plasma & particle accelerator technology
    Industrial applications of plasma & accelerator technologies
■ Professional Society:　　　　　　　　　　　　　　　　　　　　　　　　　　　　　
    Korean Physical Society,            Korean Nuclear Society,
    Korea Accelerator & Plasma Research Association,     
    American Physical Society,            IEEE
■ Award & Citation;　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 
•    Minister of Education, Science and Technology citation for the work achievement during the KSTAR construction project　(Sep. 9, 2009)
•    Korea Presidential citation for the work achievement during the PLS construction (Dec. 4, 1994)

June-Rong Chen
Dr. June-Rong Chen has over 31 years of experience in the field of accelerators. He joined the National Synchrotron Radiation Research Center (NSRRC) in 1984. In 1986, he received the PhD degree in the Department of Nuclear Engineering, National Tsing-Hua University, Hsinchu, Taiwan. He led the design and constructions of the vacuum system, the survey and alignment system, the accelerator installation, the front-end photon monitor systems, and the stability upgrades for the 1.5 GeV Taiwan Light Source, the first 3rd generation synchrotron facility in Asia. He was the Vacuum Group Leader (1992-1995), Head of the Instrumentation Development Division (1995 – 2006) of NSRRC. During the construction period of the 3 GeV Taiwan Photon Source (TPS), 2006-2014, he was the Technical Director of Accelerator Technology and Engineering. He integrated the major constructions and led the installation for the whole TPS machine complex. 

In addition to the role at NSRRC, he also serves as Joint Appointment Associate Professor (1988-1997), Professor (1997-present) in the Department of Biomedical Engineering and Environmental Sciences, National Tsing-Hua University, Hsinchu, Taiwan. He devotes himself to the study of vacuum science and technologies. He was the President (2000-2002), and is a Fellow of the Taiwan Vacuum Society since 2015. 
He has also been serving as the international organizing and program committee member of some international conferences specializing in the field of vacuum, accelerator, and the field of synchrotron radiation such as the International Vacuum Congress (IVC), the International Particle Accelerator Conference (IPAC) and the International Conference on Mechanical Engineering Design of Synchrotron Radiation Equipment and Instrumentation (MEDSI). He has presented summaries of the research findings at numerous national and international conferences, and has published over 250 articles in the fields.