Transport beam envelopes of the new µE4 beam line
Full intensity mode
In this mode the accepted solid angle is 135 msr and the momentum bite can be tuned between 5.0% and 9.5% (FWHM) by adjusting the horizontal slit in the second bending magnet ("ASK2"). The vertical(horizontal) beam envelope is shown in the upper(lower) half of the figure. The red curve is a 1.order calculation with dp/p=0%, the green one is a 1.order calculation for dp/p=3% and the black one is the corresponding 2.order beam extension. The momentum of the central trajectory is 28 MeV/c. The magnetic field values are given in kG.
Mode with dp/p resolution
In this mode the accepted solid angle is 5 msr and the momentum bite can be tuned between 1.8% and 11% (FWHM) by adjusting the horizontal slit in the second bending magnet ("ASK2"). The vertical(horizontal) beam envelope is shown in the upper(lower) half of the figure. The red curve is a 1.order calculation with dp/p=0%, the green one is a 1.order calculation for dp/p=3% and the black one is the corresponding 2.order beam extension. The pink envelope represents a 1.order calculation with dp/p=5%.