RICH, RHIC, TCIM scaler mappings
There are a number of fast scaler systems in STAR and RHIC, reading out into various places
with various mappings. This blog entry is to state what is read out, and where to get it in the various online databases.
Sources: (see https://drupal.star.bnl.gov/STAR/comp/db/onlinedb/online-server-port-map for the actual server and port maps)
RICH: This is a historical name, from the "RICH" subsystem which existed in STAR in Year 1 and Year 2. It
is read into EPICS on the platform through a VME Lecroy 1151E scaler board, with a hand-woven oscillator
to convert counts into Hz. This oscillator appears to be too short by 2% or so, so you should convert the
readings by "Real Hz = 0.982 * Reading".
It is read out into two different databases, through two different paths, and also into the datastream.
First: Conditions_rich database, table richScaler, entries are "rsxx", e.g. rs1, rs2, ... rs16, every 30 seconds
Second:MQ readout, database mq_collector_Conditions_rich, table richScalar, entries are rich_1151E_valXX, every 15 seconds
This also shows up in the datastream at 1-second intervals and gets put into the microdst in
mu->event()->runInfo().xxx, where xxx is a reasonable name
There is the backup that it can be gotten from the offline database
trigDetSums if for some reason the 1-second scalers are missing.
RHIC: This is readback through CDEV from what is sent to RHIC through their scaler boards on the platform. Some
pieces of this are direct copies through fiber from the platform to RHIC, but other pieces (coincidences of BBC) are done
in the DAQ room and so won't necessarily match exactly the RICH scalers. One other unfortunate thing is that
there is an off-by-one error in the CDEV readout, so that the signals as labeled on the front of the scaler board are
off by one from what is read out in CDEV. E.g. what is plugged into channel 1 physically on the board gets read back
in CDEV as channel 16, 2->1, etc.
Database mq_collector_Conditions_cdev, table rhicScalersDiff, entries are sisScaler.6a-star.x.diffM, e.g. sisScaler.6a-star.1.diffM, ... sisScaler.6a-star.16.diffM
TCIM: This is an internal scaler on the board that distributes the ZDC signals only. It's available at
Database mq_collector_Conditons_tcim, table tcim_registers, entries with reasonable names
Here is a mapping (updated 6/21/17 with addition of VPD signals to RHIC):
| Name | RICH Database | RICH MQ Database | Microdst | RHIC Physical | RHIC Cdev (X in sisScaler.6a-star.X.diffM) |
TCIM |
| BBCE | rs1 | rich_1151E_val1 | bbcEastRate() | 13 | 12 | N/A |
| BBCW | rs2 | rich_1151E_val2 | bbcWestRate() | 14 | 13 | N/A |
| BBC E*W | rs3 | rich_1151E_val3 | bbcCoincidenceRate() | 12 | 11 | N/A |
| Yellow Background (BBCW delayed*BBCE) |
rs4 | rich_1151E_val4 | bbcYellowBackgroundRate() | 16 | 15 | N/A |
| Blue Background (BBCE delayed*BBCW) | rs5 | rich_1151E_val5 | bbcBlueBackgroundRate() | 15 | 14 | N/A |
| ZDC East with 1 us deadtime | rs6 | rich_1151E_val6 | zdcEastRate() | 7 | 6 | zdc_east_killer |
| ZDC West with 1 us deadtime | rs7 | rich_1151E_val7 | zdcWestRate() | 6 | 5 | zdc_west_killer |
| ZDC Coincidence with 1 us deadtime | rs8 | rich_1151E_val8 | zdcCoincidenceRate() | 1 | 16 | zdc_coincidence_killer |
| VPD East | rs9 | rich_1151E_val9 | N/A | 9 (After 6/21/17) | 8 (After 6/21/17) | N/A |
| VPD West | rs10 | rich_1151E_val10 | N/A | 10 (After 6/21/17) | 9 (After 6/21/17) | N/A |
| VPD E*W | rs11 | rich_1151E_val11 | N/A | 11 (After 6/21/17) | 10 (After 6/21/17) | N/A |
| ZDC West with no deadtime | rs12 | rich_1151E_val12 | N/A | 2 | 1 | zdc_west |
| ZDC East with no deadtime | rs13 | rich_1151E_val13 | N/A | 3 | 2 | zdc_east |
| Feed from trigger system, usually ZDCE*ZDCW. FANOUT/2 |
rs14 | rich_1151E_val14 | may be available as l0RateToRich() | 8 | 7 | N/A |
| ZDC Coincidence with no deadtime | rs15 | rich_1151E_val15 | N/A | 4 | 3 | zdc_coincidence |
| MTD | rs16 | rich_1151E_val16 | may be available as backgroundRate() | N/A | N/A | N/A |
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