Proceedings of the 2nd Annual Meeting of Particle Accelerator Society of Japanand the 30th Linear Accelerator Meeting in Japan (July 20 - 22, 2005, Tosu Japan)

HIGH GRADIENT PERFORMANCE OF X-BAND ACCELERATORSTRUCTURE
Toshiyasu Higo 1 A), Ken Watanabe B), Mitsuo Akemoto A), Atsushi Enomoto A), Shigeki Fukuda A), Hitoshi Hayano A),
Noboru Kudo A), Shuji Matsumoto A), Taikan Suehara C), Nobuhiro Terunuma A), Shuichi Tokumoto A)A)
KEK, Tsukuba, JapanB)
The Graduate University for Advanced Studies, Hayama, JapanC)
The University of Tokyo, Tokyo, JapanAbstract
KEK has developed X-band accelerator structures for linear collider for more than 10 years. Recently the first
prototype accelerator structure, 60cm long and with detuning in higher modes, was tested beyond 70MV/m level. The
breakdown rate at 65MV/m with 400ns square pulse width was observed to be one per 5 hours operated at 50Hzoperation. It met the requirement of the linear collider based on X-band design assuming the rate improvement taking
the actual pulse shape into account. The dark current finally became below the measurement sensitivity, 10nA. Thebreakdown rate has decreased through the 1000-hour operation.

㨄ࡃࡦ࠼ടㅦ▤ߩ㜞㔚⇇․ᕈ㧝㧚ߪߓ߼ߦ㜞ࠛࡀ࡞ࠡ࡯ടㅦེ⎇ⓥᯏ᭴ߢߪ‫ࠗ࡜ࠦࠕ࠾࡝ޔ‬࠳࡯ߩਥ✢ᒻടㅦེߦ↪޿ࠆߚ߼ߩ㨄ࡃࡦ࠼㧾㧲ࠪࠬ࠹ࡓߩ㐿⊒ࠍⴕߞߡ߈ߚ‫ޕ‬ᱷᔨߥ߇ࠄᤓᐕ㧤᦬ߩ
+642 +PVGTPCVKQPCN 6GEJPQNQI[ 4GEQOOGPFCVKQP2CPGN ߩ ᳿ ቯ =? ߦ ࠃ ࠅ ‫ ޔ‬ᰴ ᦼ ࡝ ࠾ ࠕ ࠦ ࡜ ࠗ ࠳ ࡯
㧔+PVGTPCVKQPCN.KPGCT%QNNKFGT㧕ߣߒߡߪណ↪
ߐࠇߥ޿ߎߣߦߥߞߚ‫ࠍࠇߎޕ‬ฃߌߡ-'-ߪߎࠇ߹ߢㅴ߼ߡ߈ߚ:ࡃࡦ࠼ߩ㐿⊒ߪ஗ᱛߒ‫⿥ޔ‬વዉⓨᵢߦࠃࠆടㅦེ㐿⊒ߦ㓸ਛߔࠆߎߣߦߥߞߚ=?‫߆ߒޕ‬ߒ‫ޔ‬:ࡃࡦ࠼ᛛⴚߘߩ߽ߩߪ⾆㊀ߥ⽷↥ߢ޽ࠅ‫ޔ‬዁᧪ߩടㅦེផㅴߦኻߒߡ⽸₂ߔߴ߈ߢ޽ࠆߣ⠨߃ࠆ‫ޕ‬ߘߎߢ‫ޔ‬㊀ⷐߥ⎇ⓥ㗄⋡ߦኻߒߡߪߎࠇ߹ߢㅴ߼ߡ߈ߚ⹜㛎ࠍ⛯ߌ‫ޔ‬ᒰೋߩ⋡ᮡߦ㆐ߔࠆ߹ߢߩ⹏ଔߔࠆߎߣߦߒߚ‫ࠍࠇߎޕ‬ㅴ߼ࠆ㑆ߦ‫ߢ߹ࠇߎޔ‬ㅴ߼ߡ߈ߚ⎇ⓥ㐿⊒ߩ㓸ᄢᚑࠍⴕ߁ߣ౒ߦ‫੹ޔ‬ᓟߩ:ࡃࡦ࠼ᛛⴚ㐿⊒ߩ⛮⛯࡮⊒ዷߐߖࠆ㆏ࠍᮨ⚝ߒߡ޿ࠆ=?‫ޕ‬㧞㧚⹜㛎⸳஻:6(ᦨㄭߢߪ‫ޔ‬4(㔚ജჇᒝߩߚ߼‫↪࡯࠳ࠗ࡜ࠦࠕ࠾࡝ޔ‬㐿⊒ߩᦨ⚳ ߢ޽ࠆ22/ࠢ࡜ࠗࠬ࠻ࡠࡦ㧞บࠍ஻߃‫ޔ‬߹ߚ4(Ḯ߆ࠄടㅦ▤߹ߢߩචᢙ㨙㑆ߩࡄࡢ࡯વㅍߦߪ‫ޔ‬5.#%ߩදജࠍᓧߡૐ៊ᄬ6'ࡕ࡯࠼౞ᒻዉᵄ▤ࠍขࠅ౉ࠇߡ޿ࠆ‫ޕ‬⴫㧝 XTF ടㅦ▤ታ↪ㆇォ⁁ᴫࡕࠫࡘ࡟࡯࠲PFNဳ࡮ࠨࠗ࡜࠻ࡠࡦ㔚࿶PPMࠢ࡜ࠗࠬ࠻ࡠࡦRFࡉ࡯ࠬ࠲࡯㔚ജวᚑၮᧄ㔚ജવㅍ㐳〒㔌વㅍ࡜ࠗࡦRFࡠ࡯࠼᦭ല㔚࿶ࡄ࡞ࠬ㨪㧝㩙㨼㩂㩥⑽, 㨪㧥㧡㧑500kVએਅ
㧡㧜MW⒟ᐲ㧞บ
TWT▤㧝บ
㧟㨐Bࡂࠗࡉ࡝࠶࠼
WR90⍱ᒻዉᵄ▤Ǿ74.4 ౞ᒻዉᵄ▤SS430࠼࡜ࠗࡠ࡯࠼

㧟㧚⹜㛎ടㅦ▤㨄ࡃࡦ࠼ߩ࡝࠾ࠕࠦ࡜ࠗ࠳࡯ߦᔅⷐߥ㜞㔚ജ㧾㧲ࠪ ࠬ ࠹ ࡓ ߩ ⹜ 㛎 ߦ ㆀ ⴕ ߔ ࠆ ߚ ߼ ߦ ‫ ޔ‬:6( :DCPF 3.1 ࡝࠾ࠕࠦ࡜ࠗ࠳࡯↪ടㅦ▤⟲6GUVHCEKNKV[ ࠍ-'-ౝߦ┙ߜ਄ߍߚ =? ‫ߪߢߎߎޕ‬࡝࠾ࠕࠦ࡜ࠗ࠳࡯ߩടㅦ▤ߦߪ‫ޔ‬㧔㧝㧕ૐࠛࡒ࠶ࠢ࡜ࠗࠬ࠻ࡠࡦ⹜㛎ࠬ࠲ࡦ࠼ߣਗⴕߒߡ‫ޔ‬㧞บߩࠢ࠲ࡦࠬࠍ଻ᜬߔࠆߎߣ‫ޔ‬㧔㧞㧕㜞㔚⇇ߢ቟ቯߦടㅦ࡜ࠗࠬ࠻ࡠࡦߩ಴ജࠍวᚑߔࠆߎߣߦࠃࠅ‫ޔ‬/9ߔࠆߎߣ‫ޔ‬෸߮㧔㧟㧕㊂↥߇ߢ߈ࠆߎߣ߇ⷐ᳞ߐࠇ⚖ߩࡇ࡯ࠢ಴ജࠍᓧߡ‫ޔ‬ടㅦ▤ߩ㜞㔚⇇⹜㛎ࠍⴕ߁‫ޕ‬ߡ޿ࠆ‫ޕ‬㧝㗄ߦ㑐ߔࠆน⢻ᕈߪᣢߦታ⸽ߐࠇߡ߅ࠅ‫ޔ‬ߎߩ⹜㛎ߢߪ‫ޔ‬ടㅦ▤߿ࡄࡢ࡯ャㅍߦ↪޿ࠆዉᵄ▤㧟㗄ߩၮ␆⊛ߥᛛⴚ߽ᧄ⾰⊛ߥߣߎࠈߪᓧࠄࠇߚߣ♽ߢߩ᡼㔚߇໧㗴ߦߥࠆߩߢ‫⎇ࠍࠄࠇߎޔ‬ⓥߔࠆߚ⠨߃ߡ޿ࠆ‫ޕ‬ᱷࠆߪㄭᐕ․ߦ໧㗴ⷞߒߡ޿ࠆ╙㧞㗄߼ߦ‫ޔ‬4(ᵄᒻࠍߪߓ߼‫ޔ‬㖸㗀‫ޔ‬㨄✢╬ߩࡄ࡞ࠬߦኻߢ޽ࠆ߇‫⺰ᧄޔ‬ᢥߢߪߎࠇߩታ⸽ߦะߌߡ-'-ߢㅴߒߡ‫ޔ‬᡼㔚ࡄ࡞ࠬࠍ฽߼ߚⶄᢙࡄ࡞ࠬߩ⸃ᨆࠍⴕ߁߼ߡ߈ߡ޿ࠆ㜞㔚⇇⹜㛎ߩ⃻⁁ࠍㅀߴࠆ‫ޕ‬ߚ߼ߩ೙ᓮ♽‫ޔ‬᷹ቯ♽ࠍ஻߃ߡ޿ࠆ=?‫ޕ‬⃻⁁ߩࠪࠬ࠹ࡓࡄ࡜ࡔ࡯࠲ࠍ⴫㧝ߦឝߍࠆ‫ߦ․ޕ‬5.#%࡮-'-㑆ߢදജߒߚ㜞㔚⇇ㆇォ⹜㛎ࠍㅢߒߡ1

E-mail: toshiyasu.higo@kek.jp-323-Proceedings of the 2nd Annual Meeting of Particle Accelerator Society of Japanand the 30th Linear Accelerator Meeting in Japan (July 20 - 22, 2005, Tosu Japan)⸳⸘ᡷ⦟߇ⴕࠊࠇ‫߷߶ߪ࠲࡯ࡔ࡜ࡄ⚳ᦨޔ‬࿑㧝ߦ޽ࠆࠃ߁ߪߣߎࠈߦ೔㆐ߒߚ =? ‫ޕ‬-'-ߢߪห࿑ߦ޽ࠆ㧟⒳㘃ߩടㅦ▤ࠍ⵾૞ߒ‫⹜ޔ‬㛎ࠍⴕ߁ࠃ߁ㅴ߼ߡ޿ࠆ‫⺰ᧄޕ‬ᢥߢߪߘߩ㧝บ⋡‫ޔ‬-:‫⹜ߩߡ޿ߟߦޔ‬㛎ߦߟ޿ߡ⼏⺰ߔࠆ‫ޕ‬ᓟߩ㧞บߦߟ޿ߡ߽ᢙࡩ᦬એౝߦ⹜㛎ߔࠆ੍ቯߢ޽ࠆ‫ޕ‬

ߩ/8Oߦ㆐ߔࠆ㜞㔚⇇ㆇォߪ‫ޔ‬PUએਅߢⴕߞߚ߇‫ޔ‬ㅢᏱߩࡄ࡞ࠬ᏷PUߢߪ㔚ജャㅍ♽ߢߩ᡼㔚㗫ᐲ߇߆ߥࠅჇ߃‫߇ࠣࡦࠪ࠮ࡠࡊߩࠄߜߘޔ‬ᔅⷐߦߥߞߚߚ߼‫ᤨߩߎޔ‬ὐߢ㜞㔚⇇ࠍ⁓߁ㆇォߪ⚳ੌߒ‫ߡ޿⛯ޔ‬/8Oߢߩ㐳ᦼㆇォ․ᕈࠍ⺞ߴߡߎߩടㅦ▤ߩᦨ⚳⹏ଔߣߒߚ‫ޕ‬Three Structure Parameters0.05

vg/c (KX01)
vg/c (KX02)
vg/c (KX03)

vg/c

0.04

0.03

0.02

0.01

00

10

20

30

40

50

Cell Number࿑㧝㧦60ছ▤ࡄ࡜ࡔ࡯࠲
3.2 ⹜㛎ടㅦ▤ KX01

࿑㧟㧦KX01ࡊࡠ࠮ࠪࡦࠣጁᱧ
ౖဳ⊛ߥࡄ࡞ࠬᵄᒻࠍ࿑㧠ߦ␜ߒߚ‫࡯࡟ࡘࠫࡕޕ‬࠲㔚࿶ᵄᒻ߇⍴޿ߎߣ߆ࠄ‫ޔ‬㐳ࡄ࡞ࠬࡕ࡯࠼ߢߪ⍱ᒻᵄߢߩ⹜㛎ߪߢ߈ߥ߆ߞߚ‫ޕ‬2WNUGUJCRGCVCPFPUGEYKFVJ%T[UVCN8QNVCIGടㅦ▤ౝߩ㔚⇇ಽᏓ⍶ᱜߣࠗࡦࡊ࠶࠻‫࠻࠙ࠕޔ‬ࡊ࠶࠻ࠞࡊ࡜࡯ߢߩࡑ࠶࠴ࡦࠣࠍߣࠆߚ߼‫ޔ‬ടㅦ▤ࠍ᭴ᚑߔࠆ࠮࡞ߦ࠴ࡘ࡯࠽࡯ࡔࠞ࠾࠭ࡓࠍ஻߃ߡ޿ࠆ‫ౕࠍ࡯࠽࡯ࡘ࠴ߪߦ࡞࠮↪ࠣࡦ࠴࠶ࡑޔߒ߆ߒޕ‬஻ߒߥ߆ߞߚߎߣߦࠃࠅ‫ߣࠣࡦ࠴࠶ࡑ࡯࡜ࡊࠞޔ‬ടㅦ▤ౝߩ㔚⇇৻᭽ᕈߩਔ┙߇࿎㔍ߣߥࠅ‫ޔ‬࿑㧞ߦ␜ߒߚࠃ߁ߦࠕ࠙࠻ࡊ࠶࠻ࠞࡊ࡜࡯ㄭறߩ࠮࡞㧔ࡑ࠶࠴ࡦࠣ࠮࡞㧔㧏㧡㧟㧕ࠍ㒰޿ߚ㧞࠮࡞ߦ㔚⇇ߩჇᄢ߇⊒↢ߒߡߒ߹ߞߚ‫߽ߢࠇߎޕ‬F$⒟ᐲ߹ߢࡑ࠶
࠴ࡦࠣࠍ‶†ߦߒߡ㔚⇇ߩ৻᭽ᕈࠍ࿁ᓳߐߖߚ⚿ᨐߢߪ޽ࠆ=?‫ޕ‬-:#EEHKGNF


80



70




60
'CEE=/8O?

50 PUGE  

࿑㧠㧦400, 600, 800nsߩઍ⴫ࡄ࡞ࠬᵄᒻ

40
30
20&GUKIPA(KGNF

10'NGEVTKEA(KGNF

4.2 ೔㆐᡼㔚㗫ᐲ࿑㧡ߦ‫ࠬ࡞ࡄޔ‬᏷ߩ㑐ᢙߣߒߡ᡼㔚㗫ᐲࠍ␜ߒߚ‫ޕ‬ᮮߦઃ⸥ߒߚᢙሼߪ‫ޔ‬᷹ቯߒߚᤨ߹ߢߩࡊࡠ࠮
ࠪࡦࠣᤨ㑆ߢ޽ࠆ‫ޔߦ߁ࠃࠆ߆ࠊࠄ߆ࠇߎޕ‬᡼㔚㗫࿑㧞㧦KX01ടㅦ▤ߩ㔚⇇ᐲߪᤨ㑆ߣ౒ߦᷫዋߒߡ߅ࠅ‫ߪߦ⊛⚳ᦨޔ‬
PU*\ߢ㧡ᤨ㑆ߦ㧝࿁ 㨪$&/2WNUGU ߹ߢਅ߇ߞߚ‫ߩ࡯࠳ࠗ࡜ࠦࠕ࠾࡝ޕ‬ㆇォߪടㅦ▤లႯᤨ㑆㧠㧚ࡊࡠ࠮ࠪࡦࠣਛߪࡄࡢ࡯ࠍᰴ╙ߦ਄᣹ߐߖࠆߎߣ߆ࠄ‫࠻࠶࡜ࡈޔ‬࠻࠶ࡊߪPU⒟ᐲߢ޽ࠅ‫ᤨߩߎޔ‬㑆߇ਥߦ᡼㔚࠻4.1 ࡊࡠ࠮ࠪࡦࠣጁᱧ࡝ࠟ࡯ߦነਈߔࠆߣߔࠆߣ‫ޔ‬᡼㔚㗫ᐲߪᤨ㑆ߦ㧝߶߷㧝ᐕ㑆ߩࡊࡠ࠮ࠪࡦࠣోጁᱧࠍ࿑㧟ߦ␜ߒߚ‫ ޕ‬࿁⒟ᐲߣផቯߐࠇ‫઀ߩ࡯࠳ࠗ࡜ࠦࠕ࠾࡝ޔ‬᭽ࠍḩ⿷ߒߡ޿ࠆߎߣߦߥࠆ‫ޕ‬ᱴߤߩㆇォߪPU‫࡞࠲࡯࠻ޔ޿ߥⴕߢ\*ޔ‬00102030

4050%GNN0WODGTᤨ㑆ߦ෸ࠎߛ‫ߩߎޕ‬೨ߦ┙ߜ਄ߍᦼ㑆ߣߒߡᢙචᤨ㑆ߩ⍴ࡄ࡞ࠬߩࡊࡠ࠮ࠪࡦࠣࠍⴕߞߚ‫ޔߚ߹ޕ‬ᢙචᤨ㑆ߩ㐳ࡄ࡞ࠬ⹜㛎߽ⴕߞߡ޿ࠆ‫ᤨޕ‬㑆޽ߚࠅ

-324-

Proceedings of the 2nd Annual Meeting of Particle Accelerator Society of Japanand the 30th Linear Accelerator Meeting in Japan (July 20 - 22, 2005, Tosu Japan)߆ࠄએ㒠ߪ᷹ቯ㒢⇇એਅ ࡇ࡯ࠢ㔚ᵹP#એਅ ߣߥࠅ‫ޔ‬ㅢᏱടㅦߔࠆࡆ࡯ࡓ㔚ᵹߦᲧߴࠆߣ㕖Ᏹߦዊߐ޿ߎߣ߇ࠊ߆ߞߚ‫ޕ‬

Breakdown Rate at 50Hz and normalized to 65MV/m

Breakdowns around ACC Structure

550

10370

Downstream current

160

1

800

0.1300

1400
980
400

500
600
700
Pulse width [nsec]

800

900

CT_DN120Ra_BD
120

100

100

80

80

6060

40402020

Asymmetric reflection

BD rate [#/hr]

100

00-100-50
050
100
150
BD position [cm] identified from RF pulse shape࿑㧡㧦KX01ടㅦ▤ߩ65MV/mߢߩ᡼㔚㗫ᐲ
4.3 ᡼㔚ߩ⻉․ᕈ

࿑㧣㧦᡼㔚૏⟎ߣਅᵹ߳ߩ㔚ᵹ‫ޔ‬෸߮౉ജዉᵄ▤߳᡼㔚ߩ૏⟎ߪ‫ޔ‬㧾㧲ࡄ࡞ࠬߩᵄᒻ⸃ᨆ߿㖸㗀࠮ࡦߩ㕖ኻ⒓෻኿
ࠨ࡯߆ࠄᓧࠄࠇࠆ‫ޕ‬೨⠪ߢߩౖဳ⊛ߥ㑣୯ߪ‫ޔ‬෻኿ᵄߢㅢᏱࡇ࡯ࠢ୯ߩ㧞ഀჇߒ⒟ᐲ‫ޔ‬ㅘㆊᵄߩⓍಽ㊂ߩᷫዋߢ㧡㧑ߢ޽ࠆ‫ޕ‬᡼㔚ߪᱴߤ޽ࠆන৻ࡄ࡞ࠬౝ
㧡㧚⼏⺰ߢ⍍ᤨߦ↢ߓ‫ޔ‬వⴕࡄ࡞ࠬߦߪళ୥ߪᱴߤ⃻ࠇߥ޿ࠃ߁ߢ޽ࠆ‫ޕ‬ᭂᓸዊߥ᡼㔚ߦࠃࠆ෻኿ᵄ߿ㅘㆊᵄߩ
࡝࠾ࠕࠦ࡜ࠗ࠳࡯ߦะߌߡߩടㅦ▤㜞㔚⇇⹜㛎ࠍᓸዊߥំࠄ߉߇޽ߞߡ߽ߎࠇ߇ടㅦᐲ⊛ߦჇᄢߔࠆ
⛮⛯ߒߡ߈ߚ߇‫ޔ‬/8Oߢߩ᡼㔚㗫ᐲߦ㑐ߒߡ߶߷ߩߪࡄ࡞ࠬ㑆ࠍㅢߒߡߢߥߊ‫ޔ‬ห৻ࡄ࡞ࠬౝߢ↢ߕ઀᭽ࠍḩ⿷ߔࠆߎߣ߇ࠊ߆ߞߚ‫ߚ߹ޕ‬50MV/mએਅࠆߎߣ߇ࠊ߆ߞߚ=?‫ޕ‬ߢߩㆇォߢߪ‫ޔ‬800ns߹ߢߩㆇォ⚻㛎߇ߢ߈‫ޔ‬᡼㔚࿑ 㧢 ߪ 4( ࡄ ࡞ ࠬ ᵄ ᒻ ߆ ࠄ ߃ ࠄ ࠇ ߚ ‫ ޔ‬PU ‫ޔ‬㗫ᐲߪචಽૐߊ‫ᤨࠆ߆߆ߦࠣࡦࠪ࠮ࡠࡊޔ‬㑆߽ᢙᤨ
/8Oએ਄ߢߩ*\ߢ⚂ᤨ㑆ߦࠊߚࠆᦨ⚳㐳ᦼㆇ㑆ࠝ࡯࠳࡯ߢ޽ߞߡታ↪਄໧㗴ߥ޿‫ޕ‬ォᤨߩ᡼㔚ಽᏓߢ޽ࠆ‫ߩߎޕ‬૏⟎ߪ㖸㗀࠮ࡦࠨ࡯ߩᧄઙߩࠃ߁ߥ㨄ࡃࡦ࠼ߩ㜞㔚⇇ࠍ⋡ᜰߒߚ⹜㛎૏⟎߆ࠄᓧࠄࠇࠆ࠺࡯࠲ߣ߶߷৻⥌ߒߡ޿ࠆ=?‫ޕ‬
ߪ100MV/mએ਄ߩᦝߦ㜞㔚⇇ടㅦࠍᔅⷐߣߔࠆ㜞ࠛ᡼㔚ߪഀߦടㅦ▤ో૕ 㨪EO㑆 ߢ↢ߓߡ޿ࠆ߇‫࡯ࠡ࡞ࡀ ޔ‬ടㅦེߦኻߔࠆၮ␆⹜㛎ߦߥࠆ‫ޕ‬቟ቯߥ㜞ਅᵹࠞࡊ࡜࡯ㄭறߢߩ᡼㔚߇⧯ᐓᄙ޿ߎߣ߽ࠊ߆ߞ㔚⇇ㆇォࠍ㒖ኂߔࠆ᡼㔚ࡔࠞ࠾࠭ࡓߩ⸃᣿ߦߟߥ߇ߚ‫ߪࠇߎޕ‬࿑㧞ߦ␜ߒߚࡈࠖ࡯࡞࠼࠴ࡘ࡯࠾ࡦࠣߦࠆߪߕߢ޽ࠅ‫੹ޔ‬ᓟ㧟┨ߢㅀߴߚᓟ⛯ߩ㧞บߩടㅦࠃࠆਅᵹߩჇᄢߦ㑐ㅪߒߡ޿ࠆ߆߽ߒࠇߥ޿‫ߦ▤ ޔߚ߹ޕ‬ኻߒߡⴕ߁੍ቯߢ޽ࠆ‫ޕ‬㧜㨪ছએᄖߢߩ᡼㔚ߪ‫ޔ‬ടㅦ▤⋥೨ߩዉᵄ▤ߢߩ᡼㔚ߢ޽ࠆ‫ޔߪࠇߎޕ‬ห৻᡼㔚੐⽎ߦኻߒߡ⋧㑐⸃ෳ⠨ᢥ₂ᨆߒߚ࿑㧣߆ࠄ߽ુ߃ࠆ‫ޕ‬ടㅦ▤ౝߩ᡼㔚ߢߪ‫ޔ‬⍍ᤨߦᄢ߈ߥ㔚ᵹ߇ࡆ࡯ࡓ࡜ࠗࡦਅᵹ߳᡼಴ߐࠇ‫౉ޔ‬[1] ITRP, http://lcdev.kek.jp/LCoffice/ITRPexecsum.pdf
ജዉᵄ▤ߢߩ᡼㔚ߢߪ౉ജ߇ኻ⒓ߢ޽ࠆߩߦ෻ߒߡ
[2] ILC activities at KEK, http://lcdev.kek.jp/෻኿ᵄߩ㕖ኻ⒓ᕈ߇ᄢ߈޿ߎߣߦ⴫ࠇࠆ‫ޕ‬[3] T. Higo et al., “High Gradient Study at KEK on X-band

Number of BD

Accelerator Structure for Linear Collider”, PAC 2005,
USA.
KX01 Breakdown distribution[4] ᷰ ㆻ ⻞ . “High Gradient Test of X-band Accelerator
10Structure at GLCTA”, Proceedings of the First Annual
Meeting of Particle Accelerator Society of Japan, 2004,
8Funabashi, Japan.
6[5] ᾖᴧାᶈ. “GLXTA Control System”, ห਄.
[6] ᧃේᄢᐙ. “Analysis of X-band Structure Breakdown at
4GLCTA”, ห਄.
2[7] J. Wang and T. Higo, “Accelerator Structure Developmentfor NLC/GLC”, ICFA Beam Dynamics News Letter No.32,
0-60 -40 -20 0 20 40 60 80 100
2004.
BD position [cm][8] T. Higo et al., GLCX-NOTE-013, “Fabrication of 60cm࿑㧢㧦ᦨ⚳㐳ᦼ࡜ࡦ(>65MV/m)ߢߩ᡼㔚ಽᏓlong X-band HDS structure (KX01)”, 2005.
[9] ᷰㆻ⻞. “Xࡃࡦ࠼㜞㔚⇇ടㅦߩ㐿⊒⎇ⓥ”, ᧲ർቇ㒮4.5 ᥧ㔚ᵹᄢቇ‫ୃޔ‬჻⺰ᢥ‫ޔ‬ᐔᚑ㧝㧢ᐕᐲ.
[10]ᧃේᄢᐙ. “㨄ࡃࡦ࠼ടㅦ▤ߦ߅ߌࠆ᡼㔚⃻⽎ߩ⎇ⓥ”,
ᥧ㔚ᵹߪ਄ਅᵹ㧝㨙એౝߦ⸳⟎ߒߚࡈࠔ࡜࠺࡯᧲੩ᄢቇ‫ୃޔ‬჻⺰ᢥ‫ޔ‬ᐔᚑ㧝㧢ᐕᐲ.
ࠞ࠶ࡊߦ߅޿ߡ⋥ᵹ㔚ᵹࠍ⸘᷹ߔࠆߎߣࠃࠅ᳞߼ߚ‫ޕ‬ࡊࡠ࠮ࠪࡦࠣߩೋᦼߦߪ㧝P#⚖᷹ⷰߐࠇߚ߇‫ޔ‬ᓟᦼ-325-