Author: Hong, J.H.
Paper Title Page
TUP093 A Beam Test of Corrugated Structure for Passive Linearizer 593
 
  • H.-S. Kang, J.H. Hong
    PAL, Pohang, Kyungbuk, Republic of Korea
  
  A dechirper which is a vac­uum cham­ber of two cor­ru­gated, metal­lic plates with ad­justable gap was suc­cess­fully tested at Po­hang, in Au­gust 2013. An­other beam test was car­ried out to test the same struc­ture to see if the cor­ru­gated plates may work as a lin­earizer. The test re­sult will be pre­sented to­gether with the sim­u­la­tion re­sult.  
 
WEB02 Beam Operation of the PAL-XFEL Injector Test Facility 615
 
  • J.H. Han, S.Y. Baek, M.S. Chae, H. J. Choi, T. Ha, J.H. Hong, J. Hu, W.H. Hwang, S.H. Jung, H.-S. Kang, C. Kim, C.H. Kim, I.Y. Kim, J.M. Kim, S.H. Kim, I.S. Ko, H.-S. Lee, J. Lee, S.J. Lee, W.W. Lee, C.-K. Min, G. Mun, D.H. Na, S.S. Park, S.J. Park, Y.J. Park, Y.G. Son, H. Yang
    PAL, Pohang, Kyungbuk, Republic of Korea
  
  The Po­hang Ac­cel­er­a­tor Lab­o­ra­tory X-ray Free elec­tron Laser (PAL-XFEL) pro­ject was launched in 2011. This pro­ject aims at the gen­er­a­tion of X-ray FEL ra­di­a­tion in a range of 0.1 to 10 nm for pho­ton users with a bunch rep­e­ti­tion rate of 60 Hz. The ma­chine con­sists of a 10 GeV nor­mal con­duct­ing S-band lin­ear ac­cel­er­a­tor and five un­du­la­tor beam­lines. The linac and two un­du­la­tor beam­lines will be con­structed by the end of 2015 and first FEL ra­di­a­tion is ex­pected in 2016. As a part of prepa­ra­tion for the pro­ject, an In­jec­tor Test Fa­cil­ity was con­structed in 2012. Since De­cem­ber 2012, beam com­mis­sion­ing is being car­ried out to find op­ti­mum op­er­at­ing con­di­tions and to test ac­cel­er­a­tor com­po­nents in­clud­ing RF, laser, di­ag­nos­tics, mag­net, vac­uum and con­trol. We pre­sent the sta­tus of beam com­mis­sion­ing and com­po­nents tests at the test fa­cil­ity.  
slides icon Slides WEB02 [10.249 MB]  
 
THP011 Beam Measurement of Photocathode RF-gun for PAL-XFEL 699
 
  • J.H. Hong, M.S. Chae, J.H. Han, H.-S. Kang, C.-K. Min, S.J. Park, Y.J. Park
    PAL, Pohang, Kyungbuk, Republic of Korea
  • I.S. Ko
    POSTECH, Pohang, Kyungbuk, Republic of Korea
  
  The In­jec­tor Test Fa­cil­ity (ITF) at Po­hang Ac­cel­er­a­tor Lab­o­ra­tory (PAL) was con­structed to de­velop an in­jec­tor for the PAL X-ray free-elec­tron laser (PAL-XFEL) pro­ject. The PAL-XFEL de­sign re­quires the in­jec­tor to pro­duce an elec­tron beam with a slice emit­tance of 0.4 mm-mrad at the charge of 200 pC. A 4-hole type RF-gun has been suc­cess­fully fab­ri­cated and tested at ITF. In this paper we re­port the re­cent beam-mea­sure­ment re­sults using the RF-gun at ITF. Emit­tance mea­sure­ments have been car­ried out by chang­ing laser and RF pa­ra­me­ters.  
 
THP013 Slice Emittance Measurement using RF Deflecting Cavity at PAL-XFEL ITF 707
 
  • J. Lee
    POSTECH, Pohang, Kyungbuk, Republic of Korea
  • J.H. Han, J.H. Hong, I.S. Ko, S.J. Park
    PAL, Pohang, Kyungbuk, Republic of Korea
  
  One of key char­ac­ter­is­tic for op­er­at­ing PAL-XFEL is the time-de­pen­dent trans­verse prop­er­ties of a bunch, slice emit­tance. To achieve the de­sign FEL per­for­mance of PAL-XFEL a slice emit­tance of 0.4 mm mrad at 0.2 nC is re­quired. An In­jec­tor Test Fa­cil­ity (ITF) was con­structed to study beam prop­er­ties. In ad­di­tion to pro­jected emit­tance mea­sure­ment, slice emit­tance mea­sure­ment is being done using a trans­verse RF de­flect­ing cav­ity. We pre­sents re­sults of slice emit­tance mea­sure­ment at ITF and fu­ture plan for the op­ti­miza­tion of op­er­at­ing con­di­tion.