Transcript Sedykh_thermometry

Joint institute for nuclear research
The thermometry system
of superconducting magnets test bench
for the NICA accelerator complex.
Volkov V.I., Gorbachev E.V., Kirichenko A.E., Sedykh G.S.
NEC’2015
Superconducting magnets test bench general view
Satellite refrigerators
Shoulder 1
NEC’2015
Shoulder 2
Georgy Sedykh, JINR
Specification
- Precise temperature control in the different parts of test bench
during cryogenic tests.
- The resistance temperature sensors (Pt100, TVO) are being used as
a thermometers.
- The quantity of sensors (~25), their location and characteristics
depends on type of the test session.
The thermometry system should provide:
1.Temperature data acquisition and storage in the 24x7x365x5 mode;
2.Temperature data mapping in the graphs, tables and mnemonic
diagrams;
3.Stored temperature data viewing and exporting;
4.Easy configuration;
NEC’2015
Georgy Sedykh, JINR
Test session thermometry scheme
Cryostat with
magnet
NEC’2015
Cryostat with
current leads
Georgy Sedykh, JINR
Hardware
1. Resistance temperature sensors:
- TVO. Range: 1 kΩ (293 K) – 4.5 kΩ (4 K);
- Pt100. Range: 100 Ω (293 K) – 7 Ω (4 K);
2. NI PXI-8820 system controller;
3. NI PXIe-4357 Data Acquisition
for RTD Measurements (24 bit,
20 channels);
4. Precise current sources
- 20 µA for TVO;
- 500 µA for Pt100;
Advantages:
1.High precision;
2.High level of interference
suppression in 50 Hz;
NEC’2015
Georgy Sedykh, JINR
Software. Tango
Tango device-servers:

ADC data acquisition module (PXI modules control, data acquisition,
data filtering);

Temperature calculation module;

Database storage access module;

System configuration module;

Data export module (Excel, SQL);

Tango modules for web access (REST, WebSocket, WebAuth);
Advantages:
1.Easy management;
2.Easy extension;
3.Easy implementation to the NICA control system;
NEC’2015
Georgy Sedykh, JINR
Software. Database
 Experiments data storage;
 Configuration storage (information about session, sensors,
hardware);
Advantage:
•System configuration for the new test session can be performed by the
operator through the special configuration tool;
NEC’2015
Georgy Sedykh, JINR
Software. Client application
Web application providing operator interface
Advantages:
1.Flexible design (web desktop);
2.Access from any device in local network (PC, tablet);
3.No additional software (only web browser);
NEC’2015
Georgy Sedykh, JINR
Software. Web client application.
Table
Mnemonic
diagram
Data viewing
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Line chart
Georgy Sedykh, JINR
Tango web tools
 WebSocketDS - to read Tango attributes
through WebSockets;
 RestDS - to provide access to Tango control
system units through http(s) requests (Ajax);
 TangoWebAuth - to provide web access control;
tangodevel.jinr.ru
NEC’2015
Georgy Sedykh, JINR
Summary:
1. Standalone thermometry system for superconducting magnets test
bench;
2. Prototype for the NICA thermometry system;
3. Precision of the voltage drop across the sensor measurement ~ 10µV
per 80 mV scale. (~0.0125%);
4. User-friendly flexible web client application;
5. Toolbox consist of Tango web tools (WS, REST) with JavaScript web
framework (like ExtJS) can be used for developing other control
system client applications.
Current work:
1. Extend the system to 6 shoulders (currently 2);
2. New powerfull server Supermicro (for data storage);
3. New configuration tool (for operator’s pleasure);
NEC’2015
Georgy Sedykh, JINR
Thank you for your attention!
NEC’2015
Georgy Sedykh, JINR