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Recent progress. The mass production of straws in Dubna including quality control is proceeding . About 2 000 straws have been already manufactured ; Validation of the mechanical parts for module assembly (frames, straw spacers , manifolds , covers etc.) ;

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Recent progress
Recent progress

  • The mass production of straws in Dubna including quality control is proceeding.

  • About 2 000 straws have been already manufactured;

  • Validation of the mechanical parts for module assembly (frames, straw spacers, manifolds, covers etc.);

  • Completion of the straw installation in module 1, including quality control e.g., gas tightness, straw straightness and straw tension ;

  • Procurement of the first five modules frames;

  • Validation of the electrical connections (signal and high voltage distribution) to the straws using the so-called webs. The measured cross-talk between channels ( 3%);

  • The FPGA-based TDC have been integrated on the front-end board (cover) and the first tests are successful;

  • The first version of the straw readout board (SRB) is tested and working

SPSC meeting


The plans for 2012 include
The plans for 2012 include

  • Testing of module 1 after the completion of the wiring and followed by the integration of the two interface parts and services;

  • Design of the full SRB, mezzanine board for the TEL62 and firmware development, in order to complete the readout chain;

  • Procurement of the remaining detector components and the start of the production of the remaining modules;

  • Cosmic-rays tests of the 64-straw prototype using an independent tracker based on four Micromegas modules. The detector operation will also be tuned;

  • Beam test (June) with the 64-straw prototype and final front-end (with FPGA as TDC on the cover). The aim is to study and tune the performance of the FPGA-based TDC read-out.

  • Presence at the summer dry run in order to integrate the straw readout into the NA62 DAQ;

  • Participation in the TR in the fall of 2012 with the fully equipped module 1

SPSC meeting


Na62 straw readout
NA62 straw readout

  • Architecture chosen

    • TDC on cover with high speed serial links

  • Prototype system ready to use

    • Scaled down SRB

    • ‘left’ and ‘right’ cover

    • Basic software for scans, TDC measurement, etc

  • TEL62 mezzanine

    • Requirements an specifications discussed also with TDAQ. Defined for

      • Straw detector (SRB)

      • TDAQ

    • Some HW already tested (link chipset)

    • Firmware discussed with TDAQ

      • Will try to mimic TDCB board to be able to fully benefit from common development

  • New covers

    • Need 1 more iteration based on feedback from tests

    • Small fixes and connectors replacement, both LV and HV

    • End of May design

    • Production end of July

SPSC meeting


Module 1 assembly
Module 1 assembly

  • All 896 straws inserted and tested (straw straightness, tension and leak tightness)

  • ~30% of the straws wired and HV tested

SPSC meeting


Module assembly 1
Module assembly (#1)

  • Module 2

    • Preparing for straw insertion. Leak testing started

  • Module 3 (for Dubna)

    • Dimensional check, sealing, leak test

Module assembly:

2012 – #1 and #2 - at CERN

start #3 at Dubna

2013 – finish # 3, #4 - at Dubna

# 7 and # 8 - at CERN

2014 – # 5, 6- at Dubna

SPSC meeting