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Task #14446

New scale factors for PXIE Ring Pickups 1 & 2

Added by John Diamond almost 4 years ago. Updated over 3 years ago.

Status:
Work in progress
Priority:
Normal
Assignee:
John Diamond
Category:
MPS
Start date:
11/08/2016
Due date:
% Done:

90%

Estimated time:
3.00 h
Duration:

Description

New scale factors from Ning for Ring Pickups 1 & 2 that will require some code modification to support extra coefficients.

History

#1 Updated by John Diamond almost 4 years ago

Scale factors from Ning:

PXIE Ring Pickup Scaling Factors - 11/3/2016

On front end code:

1. M01EPC (Average Current mA) and M01EPA (moving average of M01EPC):

Current_Reading = C1 * ( C3 ^ ( C2 * RAW_CURRENT ) ) + C4
Attention: Set D80 Scaling to 1.

2. M01EPI (Intensity E10):

INT_Reading = C5 * Current_Reading * GW + C6
Attention: Set D80 Scaling to 1.

3. Intensity Threshold Settings, common unit E10(?) ( P:MPRLT , P:MPRUT ):

I_THR = ( log_base_C3( ( ( Threshold_Setting - C6) / ( GW * C5 ) - C4 ) / C1 ) ) * GW / C2
Attention: Set D80 Scaling to 1.

RAW_CURRENT: Raw Reading of "Intensity Reading Register" * GW
GW: Raw Reading of "Chopper Gate Width register" 
I_THR: Register Value for ( upper and lower ) thresholds.
Threshold_Setting: D80 Setting for Upper and Lower Thresholds

For M01EPC, M01EPA, M01EPI, MPRLT, MPRUT:
C1 = -0.83655
C2 = 0.0003773625
C3 = 1.7
C4 = 0.092139
C5 = 0.004997418
C6 = 1.445763

For M02EPC, M02EPA, M02EPI, (Lower Threshold Device Name?), (Upper Threshold Device Name?):

C1 = -0.939618
C2 = 0.0003773625
C3 = 1.7
C4 = 0.139714
C5 = 0.049947
C6 = 2.042

#2 Updated by John Diamond almost 4 years ago

  • Status changed from New to Work in progress
  • % Done changed from 0 to 90

Done & ready for testing out at PXIE.

#3 Updated by John Diamond over 3 years ago

PXIE actually wanted the ring pickup thresholds scaled to current, not intensity. Ning came up with new formulas for doing the scaling and revised the scaling factors -

PXIE Ring Pickup Scaling Factors - 11/3/2016

On front end code:

1. M01EPC (Average Current mA) and M01EPA (moving average of M01EPC):

Current_Reading = C1 * ( C3 ^ ( C2 * RAW_CURRENT ) ) + C4
Attention: Set D80 Scaling to 1.

2. M01EPI (Intensity E10):

INT_Reading = C5 * Current_Reading * GW + C6
Attention: Set D80 Scaling to 1.

3. Intensity Threshold Settings, common unit E10 ( P:MPRLT , P:MPRUT ):

I_THR = ( log_base_C3( ( ( Threshold_Setting - C6) / ( GW * C5 ) - C4 ) / C1 ) ) * GW / C2
Attention: Set D80 Scaling to 1.

3a. Current Threshold Settings, common unit mA ( assign P:MPRLT , P:MPRUT to use this):
C_THR = log_base_C3( ( Current_Reading - C4 ) / C1 ) * GW / C2
Attention: Set D80 Scaling to 1.

RAW_CURRENT: Raw Reading of "Intensity Reading Register" * GW
GW: Raw Reading of "Chopper Gate Width register" 
I_THR: Register Value for ( upper and lower ) thresholds.
C_THR: Register Value for ( upper and lower ) Current thresholds.
Threshold_Setting: D80 Setting for Upper and Lower Thresholds

For M01EPC, M01EPA, M01EPI, MPRLT, MPRUT:
C1 = -0.83655
C2 = 0.0003773625
C3 = 1.7
C4 = 0.092139
C5 = 0.004997418
C6 = 1.445763

For M02EPC, M02EPA, M02EPI, MPR2LT, MPR2UT:

C1 = -0.939618
C2 = 0.0003773625
C3 = 1.7
C4 = 0.139714
C5 = 0.049947
C6 = 2.042

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