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Beam induced heating on arc beam screens during the 25 ns MD on 24-25 October 2011

Beam induced heating on arc beam screens during the 25 ns MD on 24-25 October 2011. L. Tavian 25 October 2011. 25 ns MD on 2 4 October 2011 ( S45 as typical). Fill 2248. Fill 2247. 25 ns MD on 24 October 2011 – Fill 2247. Qbs (SR+IC scaled w/r to DR)

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Beam induced heating on arc beam screens during the 25 ns MD on 24-25 October 2011

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  1. Beam induced heating on arc beam screens during the 25 ns MD on 24-25 October 2011 L. Tavian 25 October 2011

  2. 25 ns MD on 24 October 2011(S45 as typical) Fill 2248 Fill 2247

  3. 25 ns MD on 24 October 2011 – Fill 2247 Qbs (SR+IC scaled w/r to DR) Qbs (SR+IC+EC scaled w/r to DR) Half-cell Half-cell with wrong BS type

  4. 25 ns MD on 24 October 2011 – Fill 2248 Qbs (SR+IC scaled w/r to DR) Qbs (SR+IC+EC scaled w/r to DR) Half-cell Half-cell with wrong BS type

  5. 25 ns MD on 24-25 October 2011(S45 as typical) Fill 2250 Fill 2249

  6. 25 ns MD on 24 October 2011 – Fill 2249 Qbs (SR+IC scaled w/r to DR) Qbs (SR+IC+EC scaled w/r to DR) Half-cell Half-cell with wrong BS type

  7. 25 ns MD on 25October 2011 – Fill 2250 Qbs (SR+IC scaled w/r to DR) Qbs (SR+IC+EC scaled w/r to DR) Half-cell Half-cell with wrong BS type

  8. Scrubbing or not scrubbing? Scrubbing indicator: Ratio between the average measured heating and the heating scaled from Design Report (after beam cleaning/scrubbing) 2211 2212 2213 2247 2248 2249 2250 ? ? ~2 kW per sector for the two last fills (2249 & 2250): Global assessment from RF and/or cryoplants will be a good validation of the method !

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