S.Sergeev (JINR)

Tracker consists of  4 stations of 4 views (planes) each In total ~7200 drift tubes (~450 per view) To be controlled/monitored  HV system  LV system  Gas system  Thermo-sensors

Only “CERN Standard” solutions PVSS II + JCOP framework as a basement for DCS development PVSS II is a SCADA toolkit for high level control system development  Visual programming (active pictures)  Object-oriented (data point)  encapsulation  inheritance  member fields  Event-driven  Events related to a change of a data point element (member field) value  Interpretive system  Language – some mixture of C, C++ and Pascal  Distributed system

 Straw tracker needs 4 HV (2 HV?) channels per view => 64 HV channels (32 channels)  Possible HV power supplies  CAEN HV modules A1832 – 12 channels, 6KV, 1 mA or A1535 – 24 channels, 3.5 KV, 1 mA  CAEN mainframe SY2527LC (up to 6 modules)  If Mainframe SY1527LC is used => could be shared with other sub-detectors

Windows PC OPC server PVSS II Windows or Linux PC Could be single PC TCP/IP COM/DCOM (TCP/IP) OPC client Ethernet

 Should be used Wiener power supply  Current per plain (view) ~3A  Wiener MPV 4008L could be used  4 channel per module => one unit per station  0V... 8V  5A  40W per channel  12bit control DAC, ADC  <10mV pp  Communication by TCP/IP, USB, CAN-bus

Windows PC OPC server PVSS II Windows or Linux PC Could be single PC COM/DCOM (TCP/IP) OPC client Ethernet Terminator CAN-Bus Interface (Quasar XXXX) CAN-Bus

 JCOP framework + CERN Gas working group  CERN Standard 2-component gas mixer  For safety (working in vacuum)  Up to 32 gas segments per view (???)  Two electric valves per plane (station???) with 2 flow meters to cut the gas in case of broken straw + manual valves to cut off the segment with the broken straw Open questions

 View (plane), 60 measurements in total, 0.5C  1 temperature measurement per cover on the bottom of the PCB (to measure gas and board temp)  1 voltage measurement per cover  4 temperature measurements for mechanics. There are 28 covers/view  Station  4 views  240 measurements/station (112 volt, 128 temp)  6 ELMBs  Detector  4 stations  24 ELMBs total

Windows PC OPC server PVSS II Windows or Linux PC OPC client Ethernet 4 stations CAN-Bus Interface (Quasar XXXX) CAN-Bus 6 ELMBs per station, 24 ELMBs in total, 4 CAN-bus branches Wiring is not clear, 8 ELMBs per station?

Any detector DCS has three trees  Hardware tree in terms rack-crate-board- channel. Used for geographical addressing of infrastructure units  Logical tree in terms detector-subdetector- station-plane-channel-parameter. Used for navigation in the detector view  FSM tree. Used to propagate commands from top layer to bottom layer and states from the bottom to the top. Usually it is similar to the Logical tree

NA62 Root Tracker Station1 View X LV HV1 HV4 Cover1 Cover28 Temp. Voltage LV Voltage Current Temp. HV Voltage Current Temp. Ramping Trip TO

Proposed states of the Straw tracker  DOWN, color – BLACK. All power supplies are OFF Available command – STANDBY  OFF, color – BLACK. Some power supplies are on. Available commands – STANDBY, DOWN  STANDBY, color – BLUE. All LV power supplies are ON, all HV power supplies are OFF Available commands – ON, DOWN  NOT_READY, color BLUE. ALL LV power supplies are ON, some HV power supplies are ON. Available commands – ON, DOWN  ON, color GREEN. ALL power supplies are ON. Available commands – STANDBY, DOWN  Error, color RED. Some power supplies are in TRIP state, overheating etc. Available commands – ON, STANDBY, DOWN, RESET(?)

 It seems reasonable at the beginning of the work to use individual Windows PC for Tracker DCS running PVSS system (UI manager, DB manager, Event manager, Distribution manager) and all OPC servers. This PC should provide access to all tracker GUIs.  After the development is finished it seems to be reasonable to port Tracker DCS to common DCS PC (both PVSS panels and servers. To be confirmed)  To avoid crowds at a single Central DCS PC screen we plan to run tracker GUIs (PVSS UI manager) at the tracker PCs leaving the PVSS system at the central DCS PC.  To allow simple maintenance the tracker panels, functions etc. should be converted to the JCOP framework component.