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MERIT beam optics I.Efthymiopoulos – CERN, AB Dept. MERIT, VRVS Meeting July 16, 2008.

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Presentation on theme: "MERIT beam optics I.Efthymiopoulos – CERN, AB Dept. MERIT, VRVS Meeting July 16, 2008."— Presentation transcript:

1 MERIT beam optics I.Efthymiopoulos – CERN, AB Dept. MERIT, VRVS Meeting July 16, 2008

2 September 11, 2007I.Efthymiopoulos - CERN2 MERIT Elements – Layout QFO.415s (focusing) quads 3 elements in series QDE.430s (de-focusing) quads 3 elements in series

3 Survey data after the MERIT run – 18.12.2007 September 11, 2007I.Efthymiopoulos - CERN3 Upstream face: -72.3cm

4 Beam optics Fit parameters: QFO, QDO strengths and locations (within limits) September 11, 2007I.Efthymiopoulos - CERN4

5 Beam envelope (1-sigma) -  =0.25 (mm.mrad), Dp=0.1% September 11, 2007I.Efthymiopoulos - CERN5 Without dispersion term With dispersion term  x) = 2.2mm,  y) = 0.86 mm, 164 J/gr@30TP

6 Beam optics – summary Optics solution found within the overall constrains Lack of survey before the data-taken introduced an error to the beam focus position Beam waist advanced by ~1m upstream of solenoid Beam spot estimate depends on emittance measurement We did not insist of having systematic measurement of the beam emittance during the run Only five measurements done September 11, 2007I.Efthymiopoulos - CERN6

7 June 3, 2015I. Efthymiopoulos - CERNMERIT - VRVS Meeting - 7 Beam Emittance measurement – 14 GeV/c Friday 26.10@15:55 Beam intensity: h16, 1E13

8 June 3, 2015I. Efthymiopoulos - CERNMERIT - VRVS Meeting - 8 Beam Emittance measurement – 14 GeV/c Friday 26.10@17:37 Beam intensity: 2.5E11/bunch 2 extracted bunches, DT=1.7us

9 June 3, 2015I. Efthymiopoulos - CERNMERIT - VRVS Meeting - 9 Beam Emittance measurement – 14 GeV/c Friday 26.10@18:24 Beam intensity: 1.3E12/bunch 2 extracted bunches, DT=1.7us

10 June 3, 2015I. Efthymiopoulos - CERNMERIT - VRVS Meeting - 10 Beam Emittance measurement – 24 GeV/c Friday 02.11@14:55PM Beam intensity: 2.5E11/bunch 16 bunches

11 June 3, 2015I. Efthymiopoulos - CERNMERIT - VRVS Meeting - 11 Beam Emittance measurement – 24 GeV/c Friday 02.11@16:02PM Beam intensity: 16 bunches, 6E12 protons

12 Emittance measurement Use the data to extrapolate at higher intensities September 11, 2007I.Efthymiopoulos - CERN12

13 Estimated beam spot and density Use the extrapolated emittances to estimate the beam spot and energy density at target Example : 24 GeV, 30 TP September 11, 2007I.Efthymiopoulos - CERN13

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