SIS18_HADES_SR2018
This is alternative optics, proposed by Sebastian Ratschow in August 2018. This optics gives very small beam spot size on target (better then STANDARD optics if no additional focusing is done), however it requires change of polarity of all quadrupoles except GHADQT51 and GHADQT52.
HAD(2f)SIS18_HADES_SR2018/sis18_hades_sr18_betas.png "sis18_hades_sr18_betas.png")
Twiss parameters on target:
beta_H |
beta_V |
alpha_H |
alpha_V |
1.4533 |
0.1313 |
-2.110 |
2.1483 |
The paramodi import file for this optics (cointaining only quad settings): SIS18_HADES_SR18_quads.txt