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Luminosity & Tune Shift

Luminosity & Tune Shift. So expect L to increase with 1/√ß y ,  y to decrease with √ß y. Luminosity & Tune Shift. Putting L and x together, we get: which implies that  changes with ß . Also note: x y counts, x x doesn’t as ß y << ß x ). Horizontal ß.

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Luminosity & Tune Shift

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  1. Luminosity & Tune Shift So expect L to increase with 1/√ßy, y to decrease with √ßy U. Wienands, SLAC-PEP-II PEP MTG 13-MAY-04

  2. Luminosity & Tune Shift Putting L and x together, we get: which implies that  changes with ß. Also note: xy counts, xx doesn’t as ßy<<ßx) U. Wienands, SLAC-PEP-II PEP MTG 13-MAY-04

  3. Horizontal ß It controls x and thus y • So why would we care about ßx? • Ans: It controls x and thus y • If our y is not limited, lowering ßx will raise L • Is this effect what favored low HER ßx?? U. Wienands, SLAC-PEP-II PEP MTG 13-MAY-04

  4. Knobs to try: • LER_BX_50_35.MKB (Turner, 18-Mar-04, uses QDBM* only) • HER_BX_TO_35.MKB (Donald, 21-Nov-00, uses everything) • HER_X_500_425.MKB(Nosochkov/mhd, 18-Mar-04,HER_X_425_350.MKB far eta_s quads) • HER_BETA_X_POLY.MKB (Yocky, 3-JUN-03, uses Q4…Q7) U. Wienands, SLAC-PEP-II PEP MTG 13-MAY-04

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