Rectangle and Sector bending magnet and K1 and K2 contribution

Bruce Yee · Post by **Bruce Yee** » Fri 8 Aug 2025 06:38

Dear Didier,

I would like to simulate a sector bending magnet (the angle of the beam with the dipole face is 90 deg) as shown on the left side of the
next figure.

: dipole.png (13.54 KiB) Viewed 1424 times

Following the previous discussion, you provide the following example:

EDGE Angle/2 Ldip/(Angle*3.14159/180) 100 1e-8 1e-8 150 0
BEND Angle Ldip/(Angle*3.14159/180) 0 150 0
EDGE Angle/2 Ldip/(Angle*3.14159/180) 100 1e-8 1e-8 150 0

Is this a sector-bending magnet?

One more question, related to the "EDGE" element, the values K1 and K2, how did you compute?

For K1, I find the next relationship:

: formula.png (20.18 KiB) Viewed 1424 times

Could you please tell me how to compute those contributions?

Thanks for your help and time.

Best regards,

Bruce