HOM damping performance of JLab SL21 cryomodule

H. Wang; I. Campisi; K. Beard; R. Rimmer; C. Thomas; J. Mammosser; J. Preble

HOM damping performance of JLab SL21 cryomodule

H. Wang, I. Campisi, K. Beard, R. Rimmer, C. Thomas, J. Mammosser, J. Preble

Research output: Contribution to conference › Paper › peer-review

1 Scopus citations

Abstract

The SL21 cryomodule is a first 1.5GHz, 12.5MV/m, 7-cell cavity, 8-cavity string superconducting accelerator module produced at JLab. The first two passbands of TE111 and TM110 high order modes (HOM) have to be damped to avoid beam breakup problems at 460μA current. External Q's of the HOM couplers and waveguide were measured on a copper model, on cold niobium cavities in vertical tests and finally in the cryomodule without beam. This paper presents all HOM data and general measurement techniques. A threshold current predicted by MATBBU code based on these data and the 6GeV machine beam optics is 10mA.

Original language	English
Pages	1104-1106
Number of pages	3
State	Published - 2003
Externally published	Yes
Event	PAC 2003 - Proceedings of the 2003 IEEE Particle Accelerator Conference - Portland, OR, United States Duration: May 12 2003 → May 16 2003

Conference

Conference	PAC 2003 - Proceedings of the 2003 IEEE Particle Accelerator Conference
Country/Territory	United States
City	Portland, OR
Period	05/12/03 → 05/16/03

Cite this

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title = "HOM damping performance of JLab SL21 cryomodule",

abstract = "The SL21 cryomodule is a first 1.5GHz, 12.5MV/m, 7-cell cavity, 8-cavity string superconducting accelerator module produced at JLab. The first two passbands of TE111 and TM110 high order modes (HOM) have to be damped to avoid beam breakup problems at 460μA current. External Q's of the HOM couplers and waveguide were measured on a copper model, on cold niobium cavities in vertical tests and finally in the cryomodule without beam. This paper presents all HOM data and general measurement techniques. A threshold current predicted by MATBBU code based on these data and the 6GeV machine beam optics is 10mA.",

author = "H. Wang and I. Campisi and K. Beard and R. Rimmer and C. Thomas and J. Mammosser and J. Preble",

year = "2003",

language = "English",

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note = "PAC 2003 - Proceedings of the 2003 IEEE Particle Accelerator Conference ; Conference date: 12-05-2003 Through 16-05-2003",

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T1 - HOM damping performance of JLab SL21 cryomodule

AU - Wang, H.

AU - Campisi, I.

AU - Beard, K.

AU - Rimmer, R.

AU - Thomas, C.

AU - Mammosser, J.

AU - Preble, J.

PY - 2003

Y1 - 2003

N2 - The SL21 cryomodule is a first 1.5GHz, 12.5MV/m, 7-cell cavity, 8-cavity string superconducting accelerator module produced at JLab. The first two passbands of TE111 and TM110 high order modes (HOM) have to be damped to avoid beam breakup problems at 460μA current. External Q's of the HOM couplers and waveguide were measured on a copper model, on cold niobium cavities in vertical tests and finally in the cryomodule without beam. This paper presents all HOM data and general measurement techniques. A threshold current predicted by MATBBU code based on these data and the 6GeV machine beam optics is 10mA.

AB - The SL21 cryomodule is a first 1.5GHz, 12.5MV/m, 7-cell cavity, 8-cavity string superconducting accelerator module produced at JLab. The first two passbands of TE111 and TM110 high order modes (HOM) have to be damped to avoid beam breakup problems at 460μA current. External Q's of the HOM couplers and waveguide were measured on a copper model, on cold niobium cavities in vertical tests and finally in the cryomodule without beam. This paper presents all HOM data and general measurement techniques. A threshold current predicted by MATBBU code based on these data and the 6GeV machine beam optics is 10mA.

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M3 - Paper

AN - SCOPUS:4143055981

SP - 1104

EP - 1106

T2 - PAC 2003 - Proceedings of the 2003 IEEE Particle Accelerator Conference

Y2 - 12 May 2003 through 16 May 2003

ER -

HOM damping performance of JLab SL21 cryomodule

Abstract

Conference

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