JL Abelleira Prévessin 1 December 2014 Difference in the aperture definition in ORBIT and MADX MADX ORBIT RECTELLIPSE RACETRACK APERTYPERECTELLIPSE APERTURE sxsyab addRaceTrackAperture ID: 788862
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Slide1
INJECTION OF ISOLDE BEAMS
J.L. Abelleira
Prévessin, 1 December 2014
Slide2Difference in the aperture definition in ORBIT and MADX
MADX
ORBIT
RECTELLIPSE
RACETRACK
APERTYPE=RECTELLIPSE, APERTURE={sx,sy,a,b}addRaceTrackAperture(name, node, a, b, 2sx,2sy, xoff, yoff, transp);
a
b
sx
sy
Slide3The shape of the apertures is different in ORBIT and MADX repository
MADX (
rectellipse
) ORBIT (racetrack)
In the particular case of scraper
29.56129.5614015We have less intercepting area in the ORBIT model (less losses)
Slide4PS Booster standard aperture
BR.BHZ21, APERTYPE=RECTELLIPSE, APERTURE={0.06535,0.0309,0.06535,0.048};
BR.QFO21, APERTYPE=RECTELLIPSE, APERTURE={0.057,0.057,0.057,0.057}; ! CIRCLE
QFO/QDE
BHZ
BHZQDEQFO
Slide5Apertures in the ORBIT model are too optimistic
Slide6bottleneck
BEAM SCOPE
36.82
21.69
Slide7Slide8The main source of losses of the model has been identified
Slide9Planning for this week:
-Update the apertures according with 2-GeV PSB-Rerun all the cases made in the previous studies-Define the KSW for all the users