IMPLEMENTATION OF PCS FOR MONITORING THE GROUND INTEGRITY DEVICE Jennie Burns, College of Arts and Sciences, Creighton University, Omaha, NE 68178.

IMPLEMENTATION OF PC’S FOR IMPLEMENTATION OF PC’S FOR MONITORING THE GROUND MONITORING THE GROUND

INTEGRITY DEVICEINTEGRITY DEVICE

Jennie Burns, College of Arts and Sciences, Jennie Burns, College of Arts and Sciences, Creighton University, Omaha, NE 68178Creighton University, Omaha, NE 68178

Relativistic Heavy Ion Collider Relativistic Heavy Ion Collider (RHIC)(RHIC)

located at Brookhaven National Laboratory (BNL) on Long located at Brookhaven National Laboratory (BNL) on Long Island, New YorkIsland, New York

STAR

collide gold-gold nuclei in order to study nuclear matter collide gold-gold nuclei in order to study nuclear matter created in a hot, dense state like that of 10created in a hot, dense state like that of 10 -6-6 seconds after seconds after the Big Bangthe Big Bang

STAR ExperimentSTAR ExperimentSTAR (Solenoidal Tracker at RHIC)STAR (Solenoidal Tracker at RHIC)

slow controls and collision data analysisslow controls and collision data analysis

consists of several consists of several detectors for tracking detectors for tracking and studying large and studying large numbers of charged numbers of charged particles emerging particles emerging from collisionsfrom collisions

location of location of relativistic heavy ion relativistic heavy ion collisionscollisions

Ground Integrity Device (GID)Ground Integrity Device (GID)

basis of all data and basis of all data and calculations of the experimentcalculations of the experiment

data and calculations data and calculations include measurements of include measurements of energyenergy

knowing these energies is knowing these energies is vital in determining the vital in determining the particle’s propertiesparticle’s properties

reads currentreads current

detects deviations from earth detects deviations from earth groundground

Using GroundUsing Ground

Earth GroundEarth Groundearth ground as a reference earth ground as a reference voltage = 0Vvoltage = 0V

(i.e. 78 V with respect to 0V)(i.e. 78 V with respect to 0V)

One cable from all hardware One cable from all hardware and electronics running and electronics running physically into the Earth.physically into the Earth.

ground loops = destroyed ground loops = destroyed electrical equipmentelectrical equipment

GID is the one reference point GID is the one reference point for the entire STAR for the entire STAR experimentexperiment

System GroundSystem GroundUses a voltage level inside system Uses a voltage level inside system as a reference = 0Vas a reference = 0V

All electrical happenings in All electrical happenings in building cause different potentialsbuilding cause different potentials

Necessary for all hardware and Necessary for all hardware and electronics connect to a certain electronics connect to a certain device with the reference value 0Vdevice with the reference value 0V

System grounds within experiment System grounds within experiment connected to chassis on platform connected to chassis on platform (location of devices connected (location of devices connected directly to experiment)directly to experiment)

Ground - Ground - reference from which to measure voltagereference from which to measure voltage

2 Types:2 Types:

Earth GroundEarth Ground System GroundSystem Ground

GID

Upgrade of GIDUpgrade of GID

monitored by journal entry periodically monitored by journal entry periodically throughout the daythroughout the day

GID is located in experiment hallGID is located in experiment hall

connected to a PC placed within the Data connected to a PC placed within the Data Acquisition (DAQ) Room by cableAcquisition (DAQ) Room by cable

PC connected to local networkPC connected to local network

makes it possible for GID readings to be makes it possible for GID readings to be directly monitored and archived in the main directly monitored and archived in the main controls roomcontrols room

GID DAQ Room Control Room

Upgrade GIDUpgrade GID

use Linux operating system (alternative to use Linux operating system (alternative to Windows) for developing EPICS device Windows) for developing EPICS device support for GIDsupport for GID

computer software is used for data sortingcomputer software is used for data sorting

PC runs EPICS (Experimental Physics PC runs EPICS (Experimental Physics and Industrial Control System)and Industrial Control System)

- framework for creating alarms, - framework for creating alarms, archives, control panels, displays, etc. archives, control panels, displays, etc.

Upgrade of GIDUpgrade of GIDGID raw data output:GID raw data output:

Original DataOriginal Data Formatted DataFormatted DataGID raw data output:GID raw data output:

TIPO PV AL1TIPO PV AL1 AL2AL2 STASTA

COMCOM +00087. ABN+00087. ABN ABNABN NORNORCOMCOM +00087. ABN+00087. ABN ABNABN NORNORCOMCOM +00086. ABN+00086. ABN ABNABN NORNORCOMCOM +00087. ABN+00087. ABN ABNABN NORNORCOMCOM +00087. ABN+00087. ABN ABNABN NORNOR

Stream Device (data sorting software) which easily Stream Device (data sorting software) which easily formats input dataformats input data

properly set up Stream Device for the particular properly set up Stream Device for the particular processing of the GIDprocessing of the GID’’s stringed data using C s stringed data using C programmingprogramming

GID raw data output:GID raw data output:

TIPO PV AL1TIPO PV AL1 AL2AL2 STASTA

COMCOM +00087. ABN+00087. ABN ABNABN NORNORCOMCOM +00087. ABN+00087. ABN ABNABN NORNORCOMCOM +00086. ABN+00086. ABN ABNABN NORNORCOMCOM +00087. ABN+00087. ABN ABNABN NORNORCOMCOM +00087. ABN+00087. ABN ABNABN NORNOR

Stream Device (data sorting software) which easily Stream Device (data sorting software) which easily formats input dataformats input data

properly set up Stream Device for the particular properly set up Stream Device for the particular processing of the GIDprocessing of the GID’’s stringed data using C s stringed data using C programmingprogramming

requires use of computer programming requires use of computer programming language of C and C++language of C and C++

use data sorting software to easily format use data sorting software to easily format input datainput data

Upgrade of GIDUpgrade of GIDprocessed data is sent into control panel (user interface) processed data is sent into control panel (user interface) installed on same PCinstalled on same PC

PC connected to local network by ethernetPC connected to local network by ethernet

data is broadcasted, then accessed and monitored within the data is broadcasted, then accessed and monitored within the main controls room by use of the control panelmain controls room by use of the control panel

ConclusionConclusion

make GID monitoring easily accessiblemake GID monitoring easily accessible

better isolate and quickly fix problems better isolate and quickly fix problems with GID or experimentwith GID or experiment

model for other various other upgrades of model for other various other upgrades of the STARthe STAR

AcknowledgmentsAcknowledgments

Brookhaven National LaboratoryBrookhaven National Laboratory

United States Department of EnergyUnited States Department of Energy

Creighton University High Energy Physics Creighton University High Energy Physics GroupGroup

ReferencesReferences

RHIC and STAR pictures provided by BNL RHIC and STAR pictures provided by BNL websitewebsite

Figure 1: Figure 1: http://www.lioby.com/im%5Cfence%5Cgrohttp://www.lioby.com/im%5Cfence%5Cgroundrodclamp.jpgundrodclamp.jpg

Figure 2: Figure 2: http://ecmweb.com/ar/408ecwb15fig4.jpghttp://ecmweb.com/ar/408ecwb15fig4.jpg