IPUs of CTF3: Measuring the beam with only a scope

 

 

 

 

 

 

The exact low gain coefficients measured on a scope in the Control Room are in the table below.

 

BPM

Low Gain

 

The difference between the approximate factor of 5.5 A/V and the exact value is calculated as:

A/V

d [%]

 

402

5.54

0.7

 

502

5.62

2.1

 

590

 

 

 

690

5.60

1.9

 

 

790

5.52

0.5

 

The coefficients measured on 30/10/03

825

 

 

 

890

5.59

1.6

 

 

 

An example

 

 

Data for low gain

 

S @ 420 mV = 80 mV

 

DH @ 0.820 mV = 16 mV

 

DV @ 0.320 mV = 6 mV

 

 

 

Results

 

 

 

 

This is a historical measurement of the very fist beam passing BPM 402 on 15/07/03.

 

 

 

(c) M.Gasior, AB/BDI/PI. Last updated: 30/10/03.