. Load sensors conditioners – radiation tests Mateusz Sosin BE/ABP/SU RADWG, 15.11.2011.

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Load sensors conditioners – radiation tests

Mateusz SosinBE/ABP/SU

RADWG, 15.11.2011

Mateusz Sosin Research status of Low-Beta weighting system

Summary

Load sensors under Low-Beta quadrupoles – introduction

Load sensors – signal conditioner

Conditioner crate – components & radiation tests

Questions

Load sensors conditioners – radiation tests RADWG, 15.11.2011


Load sensors under Low-Beta quadrupoles

Monitoring and adjustment system

Monitoring alignment systems: Wire Positioning Systems – (WPS) and Hydrostatic Levelling Systems (HLS) are installed on top of the cryostat (precision of measurements of a few microns)

Motorization of the Jacks according to 5 DOF 10 Vertical and 6 Radial Jacks per triplet

Problem of loosing articulation point detected at february 2011 !!! Unexpected 0.8mm Q3R5 magnet jump during repositioning dangerous for installation Reported by D.Missiaen at LMC – 02.03.2011 Load sensor solution proposed




Sensor Strain gauge – force washer type

sensor Solution tested After market study - choosed

German HBM MPZ1108010 Rad-hard qualified

Constraints Very low possible space for sensor installation (ø70, h16

mm) High load (up to 15T) Radioactive area




Configuration per one IP side: Installation for IP1,2,5,8 L&R Compatible with other SU instalations


?

S.A.S.tested by A.MarinEDMS 1062166,FipADUC cards tested by R.Denz



OUT1 ADUC ‘x51 microcontroller D/A

Suitable market accesible conditioners Expensive (0.6..1kCHF per channel) Additional cabling needed We have no influence for used components

BE-ABP-SU conditioners (Analog Devices AD7730 + ’51 based)

Cheap (0.1kCHF per channel) Suited for application Basic DSP abilities included AC/DC modes & cable compensation




BE-ABP-SU prototype and HBM-AE301 conditioners checked at specialtest bench

Similar noise with 270m cables High output signal stability for both conditioners Both solutions suitable for Low-Beta weighting

system application



SOLUTION: Basing on Survey Acquisition System electronics – create load sensors conditioning crate

Use same part of electronics like in S.A.S. (FipADUC card)

Add one PCB (12 channel input stage) in place of old S.A.S. input amplifiers board


FIP ADUC CARD

S.A.S. INPUT AMPLIFIERS BOARD

CONN.TAPE

FIP ADUC CARD

LOAD SENSORS 12 CHANNEL INPUT

STAGE PCB

CONN.TAPE

Advantages No additional cabling between conditioner and S.A.S. Small space in SU racks needed No big updates at FESA/PVSS level needed




FIP ADUC CARD

LOAD SENSORS 12 CHANNEL INPUT

STAGE PCB

CONN.TAPE


Semiconductors proposed for 12-channel input stage of conditioner crate:

12 x AD7730 – Analog Devices, CMOS, 24-Bit Sigma-Delta, Bridge Transducer ADC for Load Cell Applications (not tested)

12xMIC4427 – Micrel, MOSFET driver (not tested)

1xCPLD XC95144 – Xilinx CPLD, 144 macrocells, triple mode redundancy (5V logic compatible preffered), Actel if no agreement

1xADUC8xx – Analog Devices, ’51 based MCU with ADC & 12bit DAC (used in FipAduc, tested 100Gy)

12xLED HLMP-1700 or HLMP-1790 (tested 100Gy)

4x rectifying diodes 50WQ03FN (tested100Gy)

1x LM7805 – Linear voltage stabilizer (tested 100Gy)

2x Rail-To-Rail operational amplifier (Vcc=5V ?)




Equipment locations: IP1: US15 IP2: UA23, UA27 IP8: UA83, UA87 IP5: UJ56 -> after LS1 UL55

Equipment quantity: Each IP -> 2 crates (10 channels

for sensors + 2 spares) 8 crates in total


?Questions


According to future locations of new eqipment and radiation levels– how big is risk of radiation fails in installation places?

Because of installation works urgency– is it possible to install electronics and perform the tests later? In that case: Can we treat temporarly our components locations as ‘radiation safety’ areas?

According to problems with Xilinx XC95.. CPLD family we can change it for Actel ProAsic3, but is it really necessary in this case?

ADC tests: AD7730 & future SAS generation...

. Load sensors conditioners – radiation tests Mateusz Sosin BE/ABP/SU RADWG, 15.11.2011.

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