The following figure represents the dead cells (Dark Blue) and very weak cells (Light Blue) for run 10179077

 

 

 

 

The following is a list of dead cells (Dark Blue)

North Large (nstb=1)

South Large (nstb=2)

North Small  (nstb=3)

Small South (nstb=4)

 

The Following Cells have very low gain (light blue)

 

 

The ADC distribution (black) and led ADC distribution (red) is shown for each FMS cell in

STAR/files/userfiles/1651/file/adc.pdf

There is 1 histogram for each cell and the histograms have names that are printed with a c statement like 

printf("ADCr%d_c%d_d%d \n",row,col,nstb-1);

 

row ranges from 0 (top small) to 23 (bottom small)

row ranges from 0 (top large) to 33 (bottom large)

col ranges from  0 (center) to 11 (outside edge small)

col ranges from 0 (center) to 16 (outside edge large)

 

Bit Shifting (unlike other plots on this page, in this plot the top of the plot is the lower part of the FMS!!

 

 

 

Show with QT boards 

 

 

 

 High Voltage

I have started writing code to analyse the scripts that set high voltage for the FMS.

I input the channel maps on 

http://www.star.bnl.gov/protected/spin/FPD/FMS/run9/run9.hvmap.txt

This document specifies the following mapping for small cells.

The numbers shown in the table below are
cell value=dev*10000+chip*1000+chan*100+addr

where dev is master board (0-1)

           chip is a routing chip in the master board (0-3)

           chan is a path through the given chip to a PSU or Yale board (0-3)

           addr is a channel address  of a base on a Yale or PSU board (0-15)

 

 

 

To determine high voltage for day 179, I use the CW high voltage scripts that were saved as 20090613.tar.

This is the latest script (for setting FMS high voltage).   Scripts used here are found are at

http://www.star.bnl.gov/protected/spin/heppelmann/Run9/HighVoltageSettings/

 

 

Small Cell High Voltage

 

Instructions for using the Console program to operate the CW high voltage system is described here.

 

This tar contained files that are valid control scripts to send set points to the CW program console.

To set the CW supplies, there are 32 script files, sixteen scripts for each of the two master controller devices.

Each script enables a path (through a chip=[0-3] and channel=[0-3] on the master board dev= [0 - 1]).

The path connects through a master controller to a particular Yale or PSU board controller.

!SETdevice [dev]

!setctrl [chip] [chan]

Each Yale or PSU board controls 16 based with hardware hex i2c addresses [E0,E2,...FE]

The setpoint is (a number between 0 and 255) for a particular base.

After a path has been established, the voltage can be set with

!rdac [address] [setpoint]

 

The actual high voltage is a smooth function of this setpoint number ranging from about 1100 to about 1800.

The formula for high voltage as a function of (setpoint) depends upon information stored in the hardware at the 10% level

and is slightly different for PSU vs Yale bases. 

 

The run9.hvmap defines the connection between Small Cell detector (dev:chip:channel) and the (nstb:row:col) 

that locates the cell.

Below is shown the high voltage set points (scale from 0 to 1) for all small cells using these scripts.

 

 For detailed high voltage map with channel to high voltage map see STAR/files/userfiles/1651/file/SmallMap.txt.

 

 

 

Large Cell High Voltage

The following voltages were extracted by the script files used to set the Lecroy 1440 HV deviced.

Again the script files used are at:

 

http://www.star.bnl.gov/protected/spin/heppelmann/Run9/HighVoltageSettings/

 

For the details associated with the above figure see STAR/files/userfiles/1651/file/LargeMap.txt

 

 Time Dependent Cells

The time dependence of each cell from run 10179077 is shown in this pdf file. Every cell from the FMS is shown here with 25 plots per page. Plot names contain row,col, and nstb. They end with a string obtained with something like printf(" r%d_c%d_d%d",row-1,col-1, nstb-1).

Quality of time dependence is obtained by fitting a profile plot for the adc vs event_number to a constant value as a function of time.

Large values of timechi are what gets a cell into this list. The cutoff of 2.0 is rather arbitrary.

In the pdf plot file, the cells that made this list are shown in blue.