IAC positron beamline

Below are three possible configurations for a positron beam line at the IAC. They are listed in order of increasing complexity and difficulty and named analogously using ski trail nomenclature.

Configuration 1: "Green run"

This configuration is expected to require the minimal mount of effort (3 days) and is to be used as a "test of principle" in order to justify further investment.

Sketched (not to scale) layout of the 25 MeV beamline:

296 cm = parrallel Distance From the end of the accelerator module (After RF cavities) to experimental cell port

280 cm = Distance From accelerator zero degree beamline to Experimental Cell Wall

56 cm = distance between flanges for the first dipole

84 cm = distance between flanges for the first quad doublet

Configuration 2: " Blue run"

This configuration is expected to require a modest amount of effort (1 week) and is to be used as improved "test of principle" in order to justify further investment.

= Configuration 3: "Double Black Diamond"

This configuration is would require a substantial amount of effort (3 weeks) and is to be used as a performance test to determine the maximum positron yield from the 25 MeV linac at the IAC.

This picture shows you the current 90 degree bend into the experimental hall. Quad 1 and Quad 2 are shown and then the 2nd Dipole magnet (labeled Bending Magnet 2A a.k.a. Dipole 2) begins after Quad 1 and Quad 2. Dipole 2 is following by another Quad doublet and then a Dipole (Dipole 3) and then a final quad doublet before going through the wall into the experimental cell.

Length of Iron =

Diameter of Coils=

The next picture was taken upstream of the 90 degree bend and shows Dipole 1 which is usually off unless we want to bend beam right into the accelerator hall instead of going straight to Quad 1 and Quad 2.

Label on side of Dipole 1

Label on side of Dipole 2

The Quad doublets in the current beam line have the following label.

Quad doublet size:

We also have Quad triplet which take up less space than the doubles.