Download
1 / 11
110 likes | 213 Views
Aim of these measurements. How and when to perform these measurements. List of magnets to be tested. Configuration of the IPQs in the tunnel. Presentation of our measuring system (PXI based system & Keithley based system). Presentation of the Labview software.
E N D
Aim of these measurements. • How and when to perform these measurements. • List of magnets to be tested. • Configuration of the IPQs in the tunnel. • Presentation of our measuring system (PXI based system & Keithley based system). • Presentation of the Labview software. • Some issues to solve before starting: • Interaction with QPS systems. • Coordination with HWC. Busbars & splices measurements on IPQs Richard Mompo on behalf of the ELQA teamTE/MPE-EI
Aim of the test • Measure as precisely as possible the superconducting busbars connecting each 6KAmps current leads to the quadrupole (DFBL & SAM = Cryo link). • This portion of the circuit is not protected by a QPS. We rely only on Cryo interlock! • A nQPS dedicated to IPQ’s will be installed during next shutdown. • When do we intervene? • During « phase 2 » of the powering. (We would need to do some tests during phase 1 to test our system). • How to proceed on the field? • The plan is to put our measurement device “in parallel” to the existing “standard” QPS. • We need a 2 hours time slot to install our system during day time. • Run our system from the CCC, at night, during powering. • A dedicated Labview software will gather the data (voltage & current), calculate the resistance and give the green light to operators before going to nominal current.
Number of magnets : 78 Number of tests (= Number of intervention in the tunnel): 36 Limitations: We have 4 measuring systems • List of magnets to betested:
Sketch of the circuit to measure (2 families): D22 connectors are not available from the PE crate => Pulling of 78 cables done by Ineo this year
Layout for busbars measurements on IPQsSetup valid for measuring Q4, Q5, Q6, Q7, Q8, Q9, Q10 magnets
Hardware: • NI-PXI based system (2 units): NI PXI-2503: 24-Channel Low-Voltage Multiplexer/Matrix NI PXI-8108: 2.53 GHz Dual-Core Embedded Controller for PXI 3 cards: NI PXI-4071: 71⁄2-Digit, 26-Bit, 1000 V Digital Multimeter and 1.8 MS/s Isolated Digitizer
Hardware: • Crate (4 units): • Possibility to connect 4 IPQs at a time (P70 & D22 connectors). • Possibility to connect IPDs also.
Software: • A dedicated Labview software was written by EN/ICE • Adriaan Rijllart, Dmitriy Kudryavtesev, Alessandro Raimondo, Eric Michel, Cedric Charrondiere. • Jaromir Ludwin, Mateusz Bednarek (TE/MPE) contribution for the Keithley’s drivers. • This software will run in the CCC (via a remote desktop connection) • It will record the voltages and retrieve the current data (via the network) in order to calculate the result and give a green light or not to the operators. • The software will deal with the PXI or the Keithley so that it is transparent for the user in the CCC. • We will be able to compare the 2 systems.
Some issues to solve • Do we need a consignation of the power converters? • Do we need a consignation of the QPS? • The disconnection of the P70 connector will be seen as a quench by the QPS and therefore trigger the quench heaters. Is it a problem? • Our measuring system might disturb the proper functioning of the QPS? • Reiner is recommending to use an isolation transformer for a start. • We will need to make some tests to know more… • We will have 4 systems operational in total. • We will have to install our system during the day. • MP3 experts on charge in the CCC will take care of switching ON and OFF the system and look at the data. • We need some time to test our system and the Labview software. • Gathering of the current data via the network. • Measure the noise level. • ELQA resources already at the limit (800%)
