Differences

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--- dev:attenuators [2025/08/19 10:46] – painter
+++ dev:attenuators [2025/09/02 01:49] (current) – harvey
@@ Line 7: / Line 7: @@
 When using attenuators, they can alter the structure of the beam. This will interfere with the work that AP does during Primary beam development time, so when they request certain power levels it is best to use other devices instead.
+===Tips/Notes===
+Due to the nature of the attenuators the attenuation factor will differ from one another. One 10x attenuator will be different from another even if slightly. This is true for most of the single attenuator settings.
+The attenuation combination you might use to achieve a certain attenuation factor may produce a different beam power than another combination. Ex: If you want an attenuation factor of x500, you use D0957-1 at 5x and D0957-2 at 100x to get 500x. You could also use D0957-2 at 5x and D0974-1 at 100x as well. However, due to the orientation of the attenuators, both combinations will yield slightly different power levels in the end.
+It is best practice when combining attenuators to attempt to use attenuators that are as far apart as possible. For example, to achieve an attenuation factor of 200x, use D0957-1 at 2x and D0974-2 at 100x. This minimizes the impact attenuators have on the shape of the beam.
 ===Location===
   * MEBT
+  *[[pages:fe_diag|phoebus]]
 ===Devices===
   * D0957-1
@@ Line 16: / Line 23: @@
   * D0974-1
   * D0974-2
+----
+  *Shane: "you use D0957-1 at 5x and D0957-2 at 10x to get 500x" should say x100 attenuation, not 10x
+  *Shane: not sure it's the orientation of them that cuts beam inconsistently
+  *Shane: should be generalized beyond LINAC