Emittance Probe 3 (on the side of tank 1)

1
Emittance Probe 3 (on the side of tank 1)

• Distance From Slit to detector 2.779
• Detector with multiple collectors
• Expected collector width based on individual
  measurements 0.010 (10 mils)
• 2 copper strips and 1 Kapton strip make up a
  collector
• Width of 1 copper strip 4 mils
• Width of Kapton 2 mils
• Average Collector Width 11 mils
• The detector is comprised of 22 collectors plus 1
  additional Kapton strip
• The total detector width as measured (aprox.)
  0.246
• The average collector width is defined as the
  detector width the width of 1 Kapton strip/
  number of collectors (0.246-.002)/22
• Angular Resolution (4 mrad)
• ? Sin(?) ave. collector width / distance from
  slit
• Measured distance from shield to detector
  (aprox.) 0.187 inches

2
Emittance Probe 4 (on the top of tank 1)

• Distance From Slit to detector 2.771
• Detector with multiple collectors
• Expected collector width based on individual
  measurements 0.010 (10 mils)
• 2 copper strips and 1 Kapton strip make up a
  collector
• Width of 1 copper strip 4 mils
• Width of Kapton 2 mils
• Average Collector Width 11 mil
• The detector is comprised of 22 collectors plus 1
  additional Kapton strip
• The total detector width as measured (aprox.)
  0.247
• The average collector width is defined as the
  detector width the width of 1 Kapton strip/
  number of collectors (0.247-.002)/22
• Angular Resolution (4 mrad)
• ? Sin(?) ave. collector width / distance from
  slit
• Measured distance from shield to detector
  (aprox.) 0.195 inches

3
EMITTANCE PROBE 3 TANK 1 SIDE remeasured 9/10/04
.004
.246
Probe wire numbers
2.779"
.246
.004
4
Probe 3 and Probe 4 Output Channel mapping
Outer most
Conversion To current Channels 20 0 1 2 3
4 5 6 7 8 9 10 11 12 13 14 15 16 17
18 19 20
Conversion To probe wire numbers 21 1 2 3 4
5 6 7 8 9 10 11 12 13 14 15 16 17 18
19 20 21
German connector out side of probe Y A B C D
E F H J K L X W V U T S R P N M Y
Inner most
Red lead connected to shield
5
Basic Operation

• Probes 1-4 all use the same amplifiers. Thus
  each time a probe is used the correct cable in
  the back of rack LE1-RR2-10 needs to be connected
  to the sample and hold unit.
• The ACNET channels are
• HVEM00 through HVEM20
• The motor control channels are
• PROBE1 through PROBE4
• A 700 volt bias on the shields seems to yield
  the cleanest signal however this means that
  secondary electrons dominate the signal. Beware!
  The production of secondary electrons on surfaces
  is very dependant on the incident angle of the
  primary ion. See the next slide for a zero order
  correction.