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2010.05.18: Hayano. Cavity status; recent KEK activities. S0 cavities; MHI010, MHI011 are on a way of EP-VT , result will be later this week. (1) KEK-Hitachi collabration , KEK-Toshiba collaboration on cavity development; - PowerPoint PPT Presentation
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Cavity status; recent KEK activities2010.05.18: Hayano
(1) KEK-Hitachi collabration, KEK-Toshiba collaboration on cavity development; 9-cell cavity with no HOM couplers, but Input-port and monitor-port. Inspection was done, RF measurement are on-going Welding seam; Hitachi is fairly good, Toshiba has pits and bumps mainly on cell#1.
(2) KEK-FNAL collaboration; on molding Bumps replica of AES001 taken at FNAL during TTC were analyzed by using profiler micro-scope. (bumps are heating spot at 22MV/m)
(4) KEK-Saclay collaboration; on 1DE1 single cell sponge-wipe possibility STF-EP system create brown stains on iris, source of field emission maybe. we tried 7 times of EP with different water-rinse condition, not yet solved.
(3) KEK-JLAB collaboration; JLAB LG-01 for local grinding local grinding and 50um EP finish were over. Then molding again and found grinding edge has still little bit sharp. We will have more grinding on edge.
S0 cavities; MHI010, MHI011 are on a way of EP-VT , result will be later this week.
Toshiba 9-cell cavity
Hitachi 9-cell cavity
AES#001 3-cell Equator, t=169-1 deg.
Z-axis
To 0deg
H-field
H-field
EBW seam
AES#001 3-cell Equator, t=169-1 deg.： Profile
H-field of TM010
Surface gradient： 41 degree. and 33 degree
Kyoto-camera could only measure surface gradient less than 22degree. So it could not measure.
Z-axis
Theta
0
50
100
150
200
250
300
0 200 400 600 800
100513 AES#001 3-cell Equator, t=169deg(1) Height Profile of Z-axis by ReplicaAfter 2nd Vertical test at KEK-STF
169-1_Height [um]@700
He
ight
[um
]
Z-axis [um]
Niobium material
Vac. side
33 deg.
31 deg.
0
50
100
150
200
250
300
0 200 400 600 800
100513 AES#001 3-cell Equator, t=169deg(1) Height Profile of Theta by ReplicaAfter 2nd Vertical test at KEK-STF
169-1_Height [um]@600
He
ight
[um
]
Theta [um]
Niobium material
Vac. side
41 deg.
33 deg.
STF
Z-axis
To 0deg
AES#001 3-cell Equator, t=169-2 deg.
H-field
H-field
EBW seam
this is fake measurement
AES#001 3-cell Equator, t=169-2 deg.： Profile
H-field of TM010
Z-axis
Theta
0
50
100
150
200
250
300
0 200 400 600 800
100513 AES#001 3-cell Equator, t=169deg(2) Height Profile of Z-axis by ReplicaAfter 2nd Vertical test at KEK-STF
169-2_Height [um]@690
He
ight
[um
]
Z-axis [um]
Niobium material
Vac. side
33 deg.29 deg.
0
50
100
150
200
250
300
0 200 400 600 800
100513 AES#001 3-cell Equator, t=169deg(2) Height Profile of Theta by ReplicaAfter 2nd Vertical test at KEK-STF
169-2_Height [um]@600
He
ight
[um
]
Theta [um]
Niobium material
Vac. side
27 deg. 34 deg.
Surface gradient： 27 degree. and 34 degree
