Measurement of Proto Measurement of Proto- [SRF2009@Berlin; TUPPO 056] Progress of Work for cavity t [SRF2009@Berlin; TUPPO 056] Progress of Work for cavity t (a) Inspection of inner surfac (a) Inspection of inner surfac SC C it S t f ERL ij t At KEK (b) Measurement of the acce SC Cavity System for ERL-injector At KEK (b) Measurement of the acce SC Cavity System for ERL-injector At KEK (c) Measurement of the Qin (c) Measurement of the Qin (d) CP process (20 μm) at N KWt b SN hi E K k T Shi hid KU i (d) CP process (20 μm) at N K. Watanabe, S. Noguchi, E. Kako, T. Shishido, K. Umemori (e) Anneal process K. Watanabe, S. Noguchi, E. Kako, T. Shishido, K. Umemori (e) Anneal process, Y Yamamoto M Sato (KEK Japan) (f) I ti f i f Y. Yamamoto, M. Sato (KEK, Japan) (f) Inspection of inner surfac () Fi l EP (100 (g) Final EP process (100 μm (g) Final EP process (100 μm bl d ild b ki assembly and mild baking Ab t t assembly and mild baking (h) HOM l t i f Abstract (h) HOM coupler tuning for a Abstract (h) HOM coupler tuning for a (i) Vertical test with regular H Development of a SC Cavity Injector Cryomodule for the compact ERL (Energy - (i) Vertical test with regular H Development of a SC Cavity Injector Cryomodule for the compact ERL (Energy - * High field processing and Recovery Linac) is being continued at KEK since 2006 An injector for cERL is High field processing and Recovery Linac) is being continued at KEK since 2006. An injector for cERL is i d t l t CW l t b f 100 A t 10M V I thi (j) Inspection of inner surface required to accelerate a CW electron beam of 100mA to 10MeV. In this (j) Inspection of inner surface required to accelerate a CW electron beam of 100mA to 10MeV. In this li ti iti l h d t t iti b t RF i t l application, critical hardware components are not cavities but RF input couplers and HOM dampers Several combinations of number of cavity and cells per and HOM dampers. Several combinations of number of cavity and cells per cavity were examined and a three 2-cell cavity system was chosen for cERL cavity were examined, and a three 2-cell cavity system was chosen for cERL. Each cavity is drove by two input couplers to reduce required power handling Each cavity is drove by two input couplers to reduce required power handling capacity and also to compensate coupler kick. HOM coupler scheme was chosen capacity and also to compensate coupler kick. HOM coupler scheme was chosen f HOM d i d 4 5 HOM l t b i f h for HOM damping, and 4 or 5 HOM couplers are put on beam pipes of each for HOM damping, and 4 or 5 HOM couplers are put on beam pipes of each ca it Beca se of simplicit ca ities a e cooled b jacket scheme T o p otot pe cavity. Because of simplicity cavities are cooled by jacket scheme. Two prototype 2 cell cavities (#01 and #02) and two input couplers for compact ERL were 2-cell cavities (#01 and #02) and two input couplers for compact ERL were fabricated in 2007 and 2008 The vertical test of #01 cavity with HOM pickup fabricated in 2007 and 2008. The vertical test of #01 cavity with HOM pickup probe was carried out at April 2009 The result of vertical test and schedule will probe was carried out at April 2009. The result of vertical test and schedule will b d be reported. be reported. (a) Inspection of inner surface of SC Cavity System for compact ERL Injector at KEK (a) Inspection of inner surface of SC Cavity System for compact ERL Injector at KEK T bl B i t f ERL t KEK Table. Basic parameter of cERL at KEK F 13 GH Target of Injector System Frequency 1.3 GHz Target of Injector System N b f ll 2 Number of cell 2 Frequency : 1 3 GHz R/Q 204 Ω Frequency : 1.3 GHz R/Q 204 Ω Operation Gradient 14 5 MV/m Beam Current : 100 mA cW Operation Gradient 14.5 MV/m Beam Current : 100 mA cW Number of Input coupler 2 E 10M V Number of Input coupler 2 Energy : 10 MeV Coupler power 167 kW / coupler Energy : 10 MeV Coupler power 167 kW / coupler L ti f th B P 1 MW Coupler Coupling Qin 3 3 x 10 5 / coupler Location of thermo sensors Beam Power : 1 MW Coupler Coupling Qin 3.3 x 10 5 / coupler Beam Power : 1 MW Number of HOM coupler 4 or 5 Number of HOM coupler 4 or 5 Operating Temperature 2 K Operating Temperature 2 K Qo Eacc curve Qo – Eacc curve (i) V ti lt t ith l HO (i) Vertical test with regular HO S dF t Summary and Future Summary and Future T f ll i d t t Two fully equipped proto-typ Cell shape : TESLA like Injector cryomodule system Th l d ti l Cell shape : TESLA like Injector cryomodule system The low power and vertical The low power and vertical Th it #01 hi The cavity #01 was achieve The cavity #01 was achieve Th M fi ld hi d The Max: field was achieved The Max: field was achieved d The 2 nd vertical test of #01w The 2 vertical test of #01w cryomodule operation cryomodule operation. At present the initial surface At present, the initial surface 2 cell cavity #02 is carried o 2-cell cavity #02 is carried o The 1 st vertical test of this c The 1 st vertical test of this c The high power test of the in The high power test of the in I t l il t l HOM d il t HOM l Input coupler: coaxial-type coupler HOM damper: coaxial-type HOM coupler Input coupler: coaxial type coupler HOM damper: coaxial type HOM coupler type 2 cell cavity #01 -type 2-cell cavity #01 testing testing, ce of cavity at “As received” ce of cavity at As received , elerating mode and HOMs elerating mode and HOMs, by using dummy couplers by using dummy couplers, Nomura plating company Nomura plating company, f it ft l e of cavity after anneal process, ) H O i i ht b th i i HPR m), H 2 O 2 rinsing, hot bath rinsing, HPR, m), H 2 O 2 rinsing, hot bath rinsing, HPR, t STF i KEK g at STF in KEK, g at STF in KEK, l ti d i ti l t t t d accelerating mode in vertical test stand accelerating mode in vertical test stand, HOM pick-up antennae and T-mapping (temperature mapping) HOM pick up antennae and T mapping (temperature mapping), P t t 2 ll it #01 (F HOM l ) Long run operation to assume the cryomodule test Proto-type 2-cell cavity #01 (Four HOM couplers) Long run operation to assume the cryomodule test Proto type 2 cell cavity #01 (Four HOM couplers) e of cavity after vertical test e of cavity after vertical test. Polarization angle Polarization angle measurement for cavity measurement for cavity BPM (HOM BPM) BPM. (HOM BPM) f cavity at “As received” (b) ( ) M fh l i d HOM d Qi b i d l f cavity at As received . (b) (c) Measurement of the accelerating mode, HOMs, and Qin by using dummy couplers. (b) (c) Measurement of the accelerating mode, HOMs, and Qin by using dummy couplers. s Measured Qext of HOMs at 4 2 K Measured Qext of HOMs at 4.2 K He level when A1 feed through is heating He level when A1 feed through is heating. Due to Flange loss Due to Flange loss Rres – Temperature curve Processing History of vertical test History of Long run operation at 15 MV/m Rres Temperature curve Processing History of vertical test History of Long run operation at 15 MV/m M ik t dT i (t t i ) after High field processing until liq He was used up M pick-up antennae and T-mapping (temperature mapping), after High field processing, until liq. He was used up. Pl Plan Plan 2 ll iti (#01 d #02) dt i t l fbi td t 2007 d 2008 pe 2-cell cavities (#01 and #02) and two input couplers were fabricated at 2007 and 2008. t t f t t 2 ll it #01 id t til A il 2009 test of proto-type 2-cell cavity #01 was carried out until April 2009. test of proto type 2 cell cavity #01 was carried out until April 2009. d th ti di t (14 5 MV/ )i ti lt t (CW l ti ) ed the operation gradient (14.5 MV/m) in vertical test (CW, long run operation). ed the operation gradient (14.5 MV/m) in vertical test (CW, long run operation). d 30 MV/ t h t ti Th fi ld li it db HOM ik b d over 30 MV/m at short time The field was limited by one HOM pick-up probe d over 30 MV/m at short time. The field was limited by one HOM pick up probe. will be equipped the thermal anchor to obtain a good cooling for HOM pick-up probe to assume the will be equipped the thermal anchor to obtain a good cooling for HOM pick up probe to assume the e treatment and low power test of proto type e treatment and low power test of proto-type out out. avity will be done December 2009 avity will be done December 2009. nput couplers will be done from November 2009 nput couplers will be done from November 2009. Proto-type 2-cell cavity #2 (Five loop type HOM couplers) Proto type 2 cell cavity #2 (Five loop type HOM couplers)
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Measurement of ProtoMeasurement of Proto-[SRF2009@Berlin; TUPPO 056] Progress of Work for cavity t[SRF2009@Berlin; TUPPO 056] Progress of Work for cavity t
(a) Inspection of inner surfac(a) Inspection of inner surfac
SC C it S t f ERL i j t At KEK (b) Measurement of the acceSC Cavity System for ERL-injector At KEK (b) Measurement of the acceSC Cavity System for ERL-injector At KEK (c) Measurement of the Qiny y j (c) Measurement of the Qin( )(d) CP process (20 μm) at NK W t b S N hi E K k T Shi hid K U i (d) CP process (20 μm) at NK. Watanabe, S. Noguchi, E. Kako, T. Shishido, K. Umemori ( ) p ( μ )(e) Anneal processK. Watanabe, S. Noguchi, E. Kako, T. Shishido, K. Umemori (e) Anneal process,
Y Yamamoto M Sato (KEK Japan)( ) p ,(f) I ti f i fY. Yamamoto, M. Sato (KEK, Japan) (f) Inspection of inner surfac, ( , p ) ( ) p( ) Fi l EP (100(g) Final EP process (100 μm(g) Final EP process (100 μm
bl d ild b kiassembly and mild bakingAb t t
assembly and mild baking(h) HOM l t i fAbstract (h) HOM coupler tuning for aAbstract (h) HOM coupler tuning for a(i) Vertical test with regular H
Development of a SC Cavity Injector Cryomodule for the compact ERL (Energy-(i) Vertical test with regular H
Development of a SC Cavity Injector Cryomodule for the compact ERL (Energy- * High field processing andRecovery Linac) is being continued at KEK since 2006 An injector for cERL is High field processing andRecovery Linac) is being continued at KEK since 2006. An injector for cERL is i d t l t CW l t b f 100 A t 10M V I thi (j) Inspection of inner surfacerequired to accelerate a CW electron beam of 100mA to 10MeV. In this (j) Inspection of inner surfacerequired to accelerate a CW electron beam of 100mA to 10MeV. In this
li ti iti l h d t t iti b t RF i t l application, critical hardware components are not cavities but RF input couplers pp , p p pand HOM dampers Several combinations of number of cavity and cells per and HOM dampers. Several combinations of number of cavity and cells per p y pcavity were examined and a three 2-cell cavity system was chosen for cERL cavity were examined, and a three 2-cell cavity system was chosen for cERL. Each cavity is drove by two input couplers to reduce required power handling Each cavity is drove by two input couplers to reduce required power handling capacity and also to compensate coupler kick. HOM coupler scheme was chosen capacity and also to compensate coupler kick. HOM coupler scheme was chosen f HOM d i d 4 5 HOM l t b i f h for HOM damping, and 4 or 5 HOM couplers are put on beam pipes of each for HOM damping, and 4 or 5 HOM couplers are put on beam pipes of each ca it Beca se of simplicit ca ities a e cooled b jacket scheme T o p otot pe cavity. Because of simplicity cavities are cooled by jacket scheme. Two prototype y p y y j p yp2 cell cavities (#01 and #02) and two input couplers for compact ERL were 2-cell cavities (#01 and #02) and two input couplers for compact ERL were fabricated in 2007 and 2008 The vertical test of #01 cavity with HOM pickup fabricated in 2007 and 2008. The vertical test of #01 cavity with HOM pickup probe was carried out at April 2009 The result of vertical test and schedule will probe was carried out at April 2009. The result of vertical test and schedule will b dbe reported.be reported.
(a) Inspection of inner surface ofSC Cavity System for compact ERL Injector at KEK (a) Inspection of inner surface ofSC Cavity System for compact ERL Injector at KEK
T bl B i t f ERL t KEKTable. Basic parameter of cERL at KEKpF 1 3 GH Target of Injector SystemFrequency 1.3 GHz Target of Injector Systemq y
N b f ll 2 g j yNumber of cell 2Frequency : 1 3 GHzR/Q 204 Ω Frequency : 1.3 GHzR/Q 204 Ω q y
Operation Gradient 14 5 MV/m Beam Current : 100 mA cWOperation Gradient 14.5 MV/m Beam Current : 100 mA cWNumber of Input coupler 2
E 10 M VNumber of Input coupler 2
Energy : 10 MeVCoupler power 167 kW / coupler Energy : 10 MeVCoupler power 167 kW / couplerL ti f thB P 1 MWCoupler Coupling Qin 3 3 x 105 / coupler Location of thermo sensorsBeam Power : 1 MWCoupler Coupling Qin 3.3 x 105 / coupler Beam Power : 1 MW
Number of HOM coupler 4 or 5Number of HOM coupler 4 or 5Operating Temperature 2 KOperating Temperature 2 K
Qo Eacc curveQo – Eacc curve(i) V ti l t t ith l HO(i) Vertical test with regular HO( ) g
S d F tSummary and FutureSummary and Future T f ll i d t tTwo fully equipped proto-typ
Cell shape : TESLA likeInjector cryomodule systemy q pp p yp
Th l d ti lCell shape : TESLA likeInjector cryomodule system The low power and verticalpj y y The low power and vertical Th it #01 hiThe cavity #01 was achieveThe cavity #01 was achieveTh M fi ld hi dThe Max: field was achievedThe Max: field was achieved
dThe 2nd vertical test of #01wThe 2 vertical test of #01wcryomodule operationcryomodule operation.
At present the initial surfaceAt present, the initial surface2 cell cavity #02 is carried o2-cell cavity #02 is carried oyThe 1st vertical test of this cThe 1st vertical test of this cThe high power test of the inThe high power test of the in
I t l i l t l HOM d i l t HOM lg p
Input coupler: coaxial-type coupler HOM damper: coaxial-type HOM couplerInput coupler: coaxial type coupler HOM damper: coaxial type HOM coupler
type 2 cell cavity #01-type 2-cell cavity #01yp ytestingtesting,ce of cavity at “As received”ce of cavity at As received ,elerating mode and HOMselerating mode and HOMs,by using dummy couplersby using dummy couplers,y g y p
Nomura plating companyNomura plating company,p g p y,
f it ft le of cavity after anneal process,y p ,) H O i i h t b th i i HPRm), H2O2 rinsing, hot bath rinsing, HPR,m), H2O2 rinsing, hot bath rinsing, HPR,t STF i KEKg at STF in KEK,g at STF in KEK,
l ti d i ti l t t t daccelerating mode in vertical test standaccelerating mode in vertical test stand,HOM pick-up antennae and T-mapping (temperature mapping)HOM pick up antennae and T mapping (temperature mapping),
P t t 2 ll it #01 (F HOM l )Long run operation to assume the cryomodule test Proto-type 2-cell cavity #01 (Four HOM couplers)Long run operation to assume the cryomodule test Proto type 2 cell cavity #01 (Four HOM couplers)e of cavity after vertical teste of cavity after vertical test.
Polarization anglePolarization angle measurement for cavitymeasurement for cavity BPM (HOM BPM)BPM. (HOM BPM)
f cavity at “As received” (b) ( ) M f h l i d HOM d Qi b i d lf cavity at As received . (b) (c) Measurement of the accelerating mode, HOMs, and Qin by using dummy couplers.(b) (c) Measurement of the accelerating mode, HOMs, and Qin by using dummy couplers.
s Measured Qext of HOMs at 4 2 KMeasured Qext of HOMs at 4.2 K He level when A1 feed through is heatingHe level when A1 feed through is heating.
Due to Flange lossDue to Flange loss
Rres – Temperature curve Processing History of vertical test History of Long run operation at 15 MV/mRres Temperature curve Processing History of vertical test History of Long run operation at 15 MV/mM i k t d T i (t t i ) after High field processing until liq He was used upM pick-up antennae and T-mapping (temperature mapping), after High field processing, until liq. He was used up. p p pp g ( p pp g),
PlPlanPlan2 ll iti (#01 d #02) d t i t l f b i t d t 2007 d 2008pe 2-cell cavities (#01 and #02) and two input couplers were fabricated at 2007 and 2008. p ( ) p p
t t f t t 2 ll it #01 i d t til A il 2009test of proto-type 2-cell cavity #01 was carried out until April 2009.test of proto type 2 cell cavity #01 was carried out until April 2009. d th ti di t (14 5 MV/ ) i ti l t t (CW l ti )ed the operation gradient (14.5 MV/m) in vertical test (CW, long run operation).ed the operation gradient (14.5 MV/m) in vertical test (CW, long run operation). d 30 MV/ t h t ti Th fi ld li it d b HOM i k bd over 30 MV/m at short time The field was limited by one HOM pick-up probed over 30 MV/m at short time. The field was limited by one HOM pick up probe.
will be equipped the thermal anchor to obtain a good cooling for HOM pick-up probe to assume thewill be equipped the thermal anchor to obtain a good cooling for HOM pick up probe to assume the
e treatment and low power test of proto typee treatment and low power test of proto-typeoutout. avity will be done December 2009avity will be done December 2009. ynput couplers will be done from November 2009nput couplers will be done from November 2009. p p
Proto-type 2-cell cavity #2 (Five loop type HOM couplers)Proto type 2 cell cavity #2 (Five loop type HOM couplers)
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