SIS18_HADES_SA2018
This is alternative optics, proposed by Sabrina Appel in October 2018. The optics is a result of optimisation algorithm (Bound Optimization By Quadratic Approximation - BOBYQA). The disadvantage of this optics is large horizontal beam size (large comparing to SIS18_HADES_SR18, but comparable with STANDARD optics), but it is in the area of new, large-aperture star-shaped chambers.
HAD(2f)SIS18_HADES_SA2018/sis18_hades_sa18_betas.png "sis18_hades_sa18_betas.png")
Twiss parameters on target:
beta_H |
beta_V |
alpha_H |
alpha_V |
0.3658 |
1.2717 |
0.1066 |
2.5871 |
Comment: it is better to have small beta_V, as in SIS18_HADES_SR18 optics, because horizontal optics is anyway small for slow extraction.
The paramodi import file for this optics (cointaining only quad settings): SIS18_HADES_SA18_quads.txt