¡æ13ñú{úËõwï§ãÜóÜ¤ñpX 4 Éd¥ÎÉæéüËVXe´c¾Y(GlM[Á¬í¤@\ ¨¿\¢Èw¤ úËõ¹¤njúËõ¹OÅÍC~Ïd¬ÍÔÆÆàÉ¸ÁÄä­B[U[À±ÉKvÈõÌ­xðÛÂÉÍCèúIÉd¬lðñ³¹é×ÌüËðs¤KvªéB©ÂÄÍ

1 úÉñC[U[À±ðfµÄüËðs¤ÌªêÊIÅÁ½ªCÅßÍ[U[ªÀ±ð±¯½ÜÜCª¨«É¬«µüËðs¤Æ¢¤gbvAbvüËªå¬ÉÈÁÄ¢éBù¶ÌüËVXeÌêCüËr[Ì^C~OÉí¹uÔI©ÂÇIÉ~Ïr[ÌO¹ðÚ®³¹éiÇovðìéjÆ¢¤ìªsíêéBgbvAbvüËÅÍC[U[À±Ée¿ð^¦È¢×ÉCÇovðüË_tß¾¯ÉìèC»Ì¼ÌêÖÌO¹ÌÏ®iovÌRêjðÅ«éÀèÈ­·±Æª]Üµ¢ªCù¶ÌüËVXeÅ»êðs¤±ÆÍñíÉêJª½¢BÜ½C6 Éd¥ÎÈÇÌzuÉæÁÄÍ´IÉsÂ\Èê·çèC»ÌlÈÍüËÉ~Ïr[ªOSÌÅU®µCõÌ­xªÏ®µÄµÜ¤B±ÌâèðÈP©ÂÀ¿Éð·é×CäXÍpX4 Éd¥ÎðgÁ½Vµ¢üËVXeðJ­µCGl
M[Á¬í¤@\Ìå­xúËõ¹OiPF_ARjFig. 1É´ÀØÌ×Ì±íð±üCüË~ÏÉ¬÷µ½1)B±±ÅÍCÜ¸üËÌ´Æù¶ÌüËVXeÉÂ¢Äq×CÉpX 4 Éd¥ÎðgÁ½Vµ¢üËû@ÉÂ¢Äq×éBÈ¨CÁ¬íðêåÆ·é¤Òü¯ÌÚµ¢àeyÑQl¶£ÉÂ¢ÄÍCú{êÌðà2)Æpê
Ì_¶3)ðQÆµÄ¢½¾«½¢BüËÌ´Æù¶ÌüËVXe

Schematic drawing of the beam injection. Ordinary injection
scheme with pulsed dipole kickers is shown in (a), and thenew scheme with pulsed quadrupole magnet in (b). The
pulsed local bump of the stored beam by the injection kickers
eectively reduces the initial amplitude of the injected beam
for the ordinary system. On the other hand, the pulsed quad­rupole magnet reduces the divergence angle of the injectedbeam without exciting the dipole oscillation of the storedbeam.

³ÄCüËr[Í~ÏOÌO¤©çé×C½à~ÏOàÌdqÍÈ°çêéÆúËõðo·BdqµÈ¢ÆüËr[ÌúUÍ_NgÌå«³iOÍúËõÌ×ÉCGlM[ª¸­µCU®ÌUª¸­Ì¨Ap[`jð´¦éBüËr[ð~Ï·é×ÉµCêûÅVµ¢U®ªãN³êéiúËãNÉÖµÄÍÍCüËr[ÌU®ð_NgÌà¤ÉûßCüËr[±±ÅÍGêÈ¢jBdqªo·úËõÍdqÌ^®ûüªOðÀèÉüñÅ«éæ¤É·éKvªéB»êÉü©ÁÄúo³êé×Cá¦ÎdqªÝvO¹ÉÎµÄªÅ«êÎCúË¸ÌøÊÅüËr[ÌUÍXÉÎßÉòñÅ¢éêCúo³êéõqàÎßûüÉoÄ¸ÁÄä«CâªÄ~Ïr[Æ¬´è¤±ÆÉÈéBs­ªC»ÌCdqÌÎßûüÌ^®Êð¸­³¹éBüËr[ÌúUÍ~Ïr[ÌO¹ÆÌÔÌ£ÅúËõÉæÁÄ¸íê½GlM[Í RF ó´ÉæéÁ¬ÜéªC]ÌüËVXeÅÍCüËr[ÌúUÅâíêéªCÁ¬ÌûüÍíÉÝvO¹É½sÈûüÅðÀøIÉ¸ç·×C~Ïr[ÌO¹ðêI©ÂÇéB]ÁÄCúËõðoµÄÁ¬³êÄCÆ¢¤JèÔIÉüËr[¤É¸ç·Æ¢¤ìðs¤iFig. 1_µÉæèCdqÌÎßûüÌ^®Êª¸­µÄä«CdqajB»Ì×ÉLbJ[d¥ÎÆ¢¤d³©Âåd¬ÌpÌU®ª¸·éB±ÌøÊðúË¸Æ¢¤BêÊÉCXÎüd¥Îð¡äiÊí 4 äÈãjp¢éÌ¾ªC

üËr[ÌU®Ìå«³Í¨æ» 1`3 cmCúË¸Ì»Ì²®ÍeÕÅÍÈ­CÜ½C6 Éd¥ÎÌzuÉæÁÔÍ¨æ»\ ms ÅèC~ÏOüñÉ·éBÄÍC´IÉ~Ïr[ÌU®ªãN³êÄµÜ¤±ÆàéB»±ÅCäXÍ~Ïr[ÌO¹Ï»ðKvÆµ110  úËõ March 2009 Vol.22 No.2(C) 2009 The Japanese Society for Synchrotron Radiation ResearchúËõj[X ¡ æ13ñú{úËõwï§ãÜóÜ¤ñTable 1È¢Vµ¢üËVXeðJ­µ½B

Parameters of the pulsed quadrupole magnet

Core length [mm]300

Vertical gap of the pole [mm]36

Horizontal gap of the pole [mm]102

Coil turn number [turn]1±ÆÅCô½õwÉ¨¯éÊYÌlÉW©³¹é­«Power supply voltage [kV]20

ðàÂB~Ïr[ÆüËr[ÉÎµÄpXIÉ 4Designed (maximum) eld gradient [T/m]

3 (6)pX 4 Éd¥Îðp¢½Vµ¢üËVXe~ÏOÅÍCêÊIÉ 4 Éd¥ÎÍr[ÌW©
Ép¢çêéd¥ÎÅéB»êÍCLªÁÄä­dqr[ðCS©çÌ£Éäáµ½¥êÅàü«ÉRéÉd¥Îðp¢êÎCd¥ÎðÊé~Ïr[ðRçDesigned (maximum) current [A]¸CåUÅU®µÄ¢éüËr[ÌÝðRé±ÆªÅ

Pulse width [msec]

2.4«éBüËr[ªCalculated inductance [mH]1.8

Thickness of silicon steel [mm]0.15éUðÁÄ¢éêÅCr[Ìü«ðÝvO¹É½sÉÅ«êÎCüËr[Í»ÌUðÀøIÈúUÆµÄV½ÉU®ðnßé±ÆÉÈ2000 (4000)éiFig. 1_bjB·Èí¿CpX 4 Éd¥Îð 1 äg¤¾¯ÅC]ÌüËVXe¯lÉüËr[ÌUðÀø
IÉ¸çµC~ÏOÌÀèÌæÉûßé±ÆªÅ«éÌÅéB³çÉCÀÛÌ~ÏOÉ¨¯é²®ÌÛÉÍC¥êÌ­³Í»êÙÇ¸§Éí¹éKvÍÈ­CÂO¹ÌciCODjðâ³µÄ~Ïr[ÌO¹ªpX 4Éd¥ÎÌðÊéæ¤É·é¾¯Åæ­C»êçÍ]ÌüËVXeÉä×ÄñíÉeÕÅ

éB½¾µCpX 4 Éd¥ÎÍ~Ïr[ÉÎµÄdSU®ÍãNµÈ¢ªCpXIÉ~Ïr[ðW©·é×Cr[`óÌU®ðãN·éB±êðh®×ÉÍCpX 4 Éd¥Îð¡äp¢Äâ³ðs¤©Cé¢Í

Fig. 2 Picture of the pulsed quadrupole magnet in PF_AR tunnel.

æèÌd¥Îiá¦ÎC6 Éd¥Îjðp¢éÆ¢¤û@ªé4)BÜ½CüËr[ÌU®ÍOÌIveBNXÉË¶·é½ßCpX 4 Éd¥Îð 1 ä¾¯Ý

èOÌ 4 Éd¥ÎiQC2SjtßÆÈÁ½BKvÈpXuµ½êCüË_©çpX 4 Éd¥ÎÜÅÌIve

4 Éd¥ÎÌp[^ð Table 1 É¦·B­¢¥êðøBNXðå«­Ï¦éÆüËª¢ïÆÈéêªÊIÉ­¶³¹é×ÉCd¥ÎÌ¥ÉÌÔuðÅ«é¾¯éB·­·éÆÆàÉCd¹d³ðá­}¦é×Cêª«RCpX 4 Éd¥ÎÌÅK»ðp¢é±ÆÅC_N^Xð¬³­µ½BüËr[pX 4 Éd¥ÎÍCüËr[Ì­Upð¸ç·±ÆÅU®Ìå«³ð¸­³¹éBüËr[ðOÌAÍ½ûüÉU15 mm ÌêðÊßµCpX 4 Éd¥ÎÉæÁÄñ1.3 mrad Rçêé±ÆÉÈéB

p[`àÉûßéÆ¢¤ð©çCKvÈ­UpÏ»ÊªÜéBüËpÌpX 4 Éd¥ÎÌC~ÏOOüËX^fBÌÊ

¹ãÉ¨¯éÝuêÍCU®µÄ¢éüËr[ª»Ì}VX^fBðs¤½ßCÜ¸ÍpX 4 Éd¥ÎÏ»ÊÈãÌ­UpðàÂêÉÀçêéBêûCpX

Æd¹ðgÝí¹Cã¥±Æ¥êªèðsÁ½BÝv

4 Éd¥ÎÌ¥êÌ­³ÍüËr[ÌUÉäáµÄÊèÌ«\ªoÄ¢é±ÆðmFµ½ãCPF_AR gl

å·é½ßCüËr[ÉÎµÄàÉÀÛÉÝuµ½iFig. 2jBr[ðgÁ½X^fBéêèÌpx¸­ð^¦éÌÉKvÈ¥êÌ­³ÍC»ÌêÌr[ÌUÉðJnµ½»ÌúÌàÉCüËø¦Í»êÙÇæ­È¢àË¶·éB±Ì¼ÒÌÞè¢ÉæèCpX 4 Éd¥ÌÌüËÉ¬÷µCOÉdqr[ª~Ï³ê½BÜÎÌÅKÈÝuêªÜéB
PF_AR Íü·377 mCPo`^]ÉÁ»µ½úËõpêpÌ~ÏOÅéBüËr[ÌGlM[Í3.0 GeV C»Ì ãC6.5 GeV Ü År[ ðÁ ¬µ Ä[U[ÆÈéBüË¼ãÌ~Ïd¬Í¨æ»60 mA Å

½C~Ïr[ÆüËr[ÌO¹ðâ³µCÝvlÉßÃ¯½ÊCüËÌ~Ïr[ÌU®ÍÙÚ}§³ê
iFig. 3jCüËø¦à]ÌVXeÆ¯öxÜÅüP³
ê½B
PF_AR ÌügÁ¬iRFjó´ÉÍ½Zó´ªÌéBPF_AR ÌêCpX 4 Éd¥ÎðÝu·éÌÉp³êÄ¨èCZ¢¼üÅø¦IÉr[ðÁ¬Å«éÅKÈêÍCüË_©çñ15 m º¬COìÎÌ_½ÊC[hÉæér[sÀè«Ìâèªð¯çêúËõ March 2009 Vol.22 No.2  111ð}¦é±ÆÉ¬÷µCÙÚÀèµÄ60 mA ÈãÜÅ~Ï·é±ÆªÂ\ÉÈÁ½iFig. 4jB
Ó«{¤ÍÂlÅsÁ½àÌÅÍèÜ¹ñBúËõ¹¤nd¥ÎÉüËO[vÌFlCÁÉ¤¯¤ÒCiÒÅéO[v[_[Ì¬ÑK¥y³öÉ[­´Ó¢½µÜ·BZ~bN_Ngâ`óÏ·ÌÝvC»ìCd¥ÎÌOÖÌÝuÈÇÉÖµÄÍ^óO[vÌûXÉåÏ¨¢bÉÈèÜµ½BÜ½C}VX^fBÅÍC
RF O[vÌFlCAR ¤¯`[Ìr[ffO[vÌûXCå¨«¤ SOR {ÝÌFlÈÇCåÏ½­ÌûXÉ¨¢bÉÈèÜµ½Bà¿ëñCLINAC â KEKBÌûXÌ¦ÍÈµÉàX^fBÍÅ«Ü¹ñÅµ½BÅãFig. 3The oscillation of the stored beam at the injection by pulsed
dipole kickers (a) and pulsed quadrupole magnet (b). The
maximum amplitude of the excited coherent dipole oscilla­tion is about 0.6 mm for the case with dipole kickers and 0.1mm for the case with pulsed quadrupole magnet.

ÉCpX 4 Éd¥ÎÉæéüËÌLø«ð·®Éð
µC\Zl¾ÉsÍµÄ¸«Üµ½úËõ¹¤nOå²Ì¬Ñ³T¼_³öC»µÄíÉäXðãÜµ¾µÄº³¢Üµ½»å²Ìtúrv³öÉ´Ó¢½µÜ·BÇ¤àèªÆ¤²´¢Üµ½HQl¶£1) ´c¾YC¬ÑK¥F
gpX 4 Éd¥ÎÉæéüËVXehCPF NEWS Vol. 26 No. 1 May, 2008.
2) ´c¾YC¬ÑK¥FgiðàjpX 4 Éd¥ÎÉæéüËVXehCÁ¬íwïC2 ª 3 C2005N10D3) K. Harada, Y. Kobayashi, T. Miyajima and S. Nagahashi:``New injection scheme using a pulsed quadrupole magnet in elec­tron storage rings'', Phys. Rev. ST Accel. Beams 10, 123501(2007).
4) H. Takaki et al: ``Development of a pulsed sextupole magnet
system for beam injection at the photon factory storage ring'',
Proc. of PAC 2007, pp. 230_232 (2007).
Fig. 4Stored current history for the injection with a pulsed quadru­
pole magnet. The maximum stored current at the single
bunch mode is 68 mA after various ne tunings.

 ÒÐî ´c¾YÈ¢BüËÌÛCr[ð~ÏµÄä­ÆCsÀè«ªã
N³êC~Ïr[TCYªå·éBpX 4 Éd¥ÎÌ¥êÍUÉäáµÄÁ·é×Cr[TCYªå«­ÈéÆ»Ìð­­Ré±ÆÉÈèC~Ïr[Ìêð¸ÁÄµÜ¤±ÆÉÈÁ½B±ÌêC~ÏÂ\ÈÅåd ¬lÍ ¨æ »30 mA Æ ÈéB sÀ è« ð}¦ é½ßCåÉ RF ÖAÌp[^Ì²®ð±¯½ÊC~Ïr[ÌsÀè«Æ~Ïd¬ÁÉº¤r[TCYÁ

112  úËõ March 2009 Vol.22 No.2

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