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FTT Strip information table request

Updated on Wed, 2024-11-20 02:31. Originally created by wangzhen on 2024-11-20 02:31.

 this blog is for the FTT strip information table request

1) Variables and update frequency:       
strip_ch
strip_center
strip_length
strip_LEdge
strip_REdge

Very rare update - stores a FTT strip information which is static unless there is a mistake discovered or a hardware failure that requires remapping. May be updated < 10 times in next few years.

2)  IDL structure:
```
/* FttStripInfo.idl
*
* Table: FttStripInfo
*
* description: // sTGC (ftt) strip length, center position, left edge position and right edge postion
*
* number of channels in one FTT module (167+153+94+151+59)*2
*/

struct fttHardwareMap {


    unsigned short strip[1251]; /*strip ID 0-1250*/
    float strip_center[1251]; /* strip center for strip 0-1250*/
    float strip_length[1251]; /* strip length for strip 0-1250*/
    float strip_LEdge[1251]; /* strip left edge position for strip 0-1250*/
    float strip_REdge[1251]; /* strip right edge position for strip 0-1250*/
};
```

3) I am always a little confused about this. Updates rare, expect 1250 rows each with the structure above
Zhen: I think it should be a indexed table, since this tabel updata rare. but this table only corresponding one subdectector(FTT) but different channel.


4) size of structure
5)


5 * 32 bytes * 1251 array lengths 
The size from sizeof() 22520, with stardev
 
5) wangzhen (wang.zhen@sdu.edu.cn)
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