Q[sub 0] Degradation of LANL 700-MHZ [beta]=0.64 Elliptical Cavities and ANL 340 MHZ Spoke Cavities

Conference · Mon Dec 31 23:00:00 EST 2001

OSTI ID:976183

Tajima, T ^[1]; Chan, K D ^[2]; Edwards, R L ^[3]; Gentzlinger, R C ^[4]; Kelley, J P ^[5]; Krawczyk, F L ^[6]; Madrid, M A ^[7]; Montoya, D I ^[8]; Schrage, D L ^[9]; Shapiro, A H ^[10]

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1. Tsuyoshi
2. Kwok-Chi D.
3. Randall L.
4. Robert C.
5. John Patrick
6. Frank L.
7. Michael A.
8. Debbie I.
9. Dale L.
10. Alan H.

The quality factor (Q{sub 0}) of most of the six LANL {beta} = 0.64 700-MHz 5-cell elliptical cavities starts to drop at E{sub acc} = 8-10 MV/m, which may be related to multipacting. Residual resistances of these cavities were measured to be 5.0-7.6 n{Omega}. The sensitivity of surface resistance to the external magnetic field was measured to be 0.22 n{Omega}/mG. Q disease tests have shown no significant Q{sub 0} degradation for both elliptical cavities and a spoke cavity with our 100 {micro}m BCP.

• Research Organization: Los Alamos National Laboratory
• Sponsoring Organization: DOE
• OSTI ID: 976183
• Report Number(s): LA-UR-02-3080
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
ANL
CAVITIES
DISEASES
LANL
MAGNETIC FIELDS
QUALITY FACTOR
SENSITIVITY