Orsay: trying out S2 detectors

Although we don't have LEDAs to burn, we do have S2s, apparently. Try those: at 55 and 190 mm from the target they cover 3.3-32.5' with really high efficiency. The hit pattern is shown below...



...and the angular distribution of ¹⁸O and α hits:


Compare these to the hit patterns and ang dists of one arrangement of 6 ps3ds:




Advantages of using S2s instead of PS3Ds: Lots of coverage; easy analysis; Q value no less precise; fewer channels of electronics; fewer detectors to fry.

Disadvantages: we have to scramble for pre-amps and cabling and such; and we don't get to use the Deep Space Nine mount.

Thoughts?