Author: Piel, C.
Paper Title Page
THPAB178 The SIS100 Extraction and Emergency Kicker Magnet System 4115
 
  • J.H. Hottenbacher, K. Dunkel, M. Eisengruber, M. Osemann, A. Padvi, C. Piel
    RI Research Instruments GmbH, Bergisch Gladbach, Germany
  • S. Heberer, I.J. Petzenhauser
    GSI, Darmstadt, Germany
  
  The ex­trac­tion and emer­gency kicker sys­tem for SIS100 is a bipo­lar kicker sys­tem that al­lows for an in-situ choice be­tween two di­rec­tions: ex­trac­tion to the ex­per­i­ments or to the beam dump. For that, both mag­net ends are con­nected to a PFN each which are being charged si­mul­ta­ne­ously up to 80kV con­tin­u­ously. Due to the sta­tic HV op­er­a­tion, dif­fer­ent to usu­ally in other pulsed kicker sys­tems, not only dis­place­ment cur­rent is flow­ing in the fer­rite ma­te­r­ial. After less than 1s, the fer­rite ma­te­r­ial is nearly field-free and the E-field is con­cen­trated in the sur­round­ing ce­ramic mag­net clamp mech­a­nism. As the field is fur­ther con­cen­trated in gaps be­tween ce­ramic and metal­lic parts, the HV lay­out of the mag­net is a crit­i­cal de­sign task. As a mag­netic field ho­mo­gene­ity of ±1% is re­quired, spe­cial shap­ing of the coil is re­quired as found dur­ing it­er­a­tive 3D field sim­u­la­tions. The kicker cham­ber is de­signed to op­er­ate at a pres­sure level of 3·10-11 mBar. As one 3 me­ter-cham­ber con­tains 3.5 m² fer­rite sur­face, care­ful vac­uum heat treat­ment of the fer­rite is re­quired to reach this pres­sure level. The paper will de­scribe de­sign prin­ci­ples for HV and UHV and ef­fects found by 3D mod­el­ing.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB178  
About • paper received ※ 18 May 2021       paper accepted ※ 28 July 2021       issue date ※ 26 August 2021  
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