First irradiation tests results of the ALICE TPC Readout Control Unit 2

Zhao, C.; Røed, K.; Alme, J.; Costa, F.; Lippmann, C.; Rehman, A.; Torsvik, I Nikolai; Kiss, T.; David, E.; Velure, A.; Bratrud, L.; Torgersen, C.; Röhrich, D.; Ullaland, K.

doi:10.1088/1748-0221/10/01/c01016

Cited by 5 publications

(8 citation statements)

References 9 publications

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“…In accordance with the previous tests [8], the Trigger Reception (TTCrx) is stable: no error was seen in this irradiation test. The Monitoring and Safety Module (MSM) is also stable, which means that no error has been seen on RCU2 side.…”

Section: Trigger Interface Ethernet and Msm Stabilitysupporting

confidence: 91%

“…As presented in figure 1, the upgrades from RCU1 to RCU2 generally includes five aspects: (1) The GTL bus is divided into four branches from the current two branches structure, (2) the speed of detector data link (DDL) [6] is increased from 1.28 Gbps to 4.25 Gbps, (3) the functionalities of three PCB boards in RCU1 are integrated into a single PCB board in the RCU2, (4) the flash based Microsemi Smartfusion2 (SF2) FPGA [7] is chosen to replace the two SRAM based FPGAs and one flashed based FPGA in the RCU1, (5) a detector pad based readout scheme, aiming at utilizing the parallelism of improved hardware, is designed. More details regarding the upgrades from RCU1 to RCU2 has been discussed in [4,6,8].…”

Section: Jinst 11 C01024mentioning

confidence: 99%

“…The RCU2 has been through several irradiation campaigns, and the results on the final version of the RCU2 hardware have so far been promising. More details on the previous irradiation tests results can be found in [8].…”

Section: System Level Irradiation Testmentioning

confidence: 99%

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First performance results of the ALICE TPC Readout Control Unit 2

Zhao

Alme²,

Alt

et al. 2016

J. Inst.

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A: This paper presents the first performance results of the ALICE TPC Readout Control Unit 2 (RCU2). With the upgraded hardware typology and the new readout scheme in FPGA design, the RCU2 is designed to achieve twice the readout speed of the present Readout Control Unit. Design choices such as using the flash-based Microsemi Smartfusion2 FPGA and applying mitigation techniques in interfaces and FPGA design ensure a high degree of radiation tolerance. This paper presents the system level irradiation test results as well as the first commissioning results of the RCU2. Furthermore, it will be concluded with a discussion of the planned updates in firmware. K: Radiation-hard electronics; Front-end electronics for detector readout; Time projection Chambers (TPC); Data acquisition concepts 1Corresponding author.

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Section: Trigger Interface Ethernet and Msm Stabilitysupporting

confidence: 91%

Section: Jinst 11 C01024mentioning

confidence: 99%

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First performance results of the ALICE TPC Readout Control Unit 2

Zhao

Alme²,

Alt

et al. 2016

J. Inst.

Self Cite

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“…The first campaigns identified certain problem areas, which lead the to a substantial delay of the project [15]. These challenges, including single event latchups in the SF2 FPGA and a non satisfactory fault tolerance of the Trigger, Timing and Control interface, has been dealt with.…”

Section: Upgrades For Runmentioning

confidence: 99%

Upgrades of the ALICE TPC Front-End Electronics for Long Shutdown 1 and 2

Velure

2015

IEEE Trans. Nucl. Sci.

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This paper presents the front-end electronics upgrades of the ALICE Time Projection Chamber detector for the coming years, with a focus on the upgrades for Long Shutdown 2. The Large Hadron Collider is currently in Long Shutdown 1 following a successful first run, and upgrades of the detectors are underway to support the higher particle interaction rates planned for the next run. For the Time Projection Chamber, the increase in data due to the higher interaction rate and higher energy will cause a bottleneck in the Readout Control Unit and a new board is in development which increases the data-link speed to the back-end. Another more general upgrade of the ALICE experiment is planned for Long Shutdown 2, foreseen to start in 2018. In this case the goal is to cope with an even higher interaction rate of 50 kHz for Pb-Pb collisions. The present Multi Wire Proportional Chambers of the Time Projection Chamber will then be replaced by Gas Electron Multiplier technology. At the same time, the front-end electronics and readout system will also be replaced.

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“…Frequent radiation related errors will have a significant impact on the efficiency of the ALICE detector. For this reason, characterization of the radiation tolerance of the two CDR solutions and the RCU2 in general has been performed during several irradiation campaigns [20].…”

Section: Tests and Measurementsmentioning

confidence: 99%

Clock and data recovery methods for the readout control unit 2 in ALICE TPC

Torgersen¹,

Alme²,

Bratrud³

et al. 2015

J. Inst.

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The present ALICE TPC readout electronics consists of 4356 Front End Cards that are read out and controlled by a total of 216 Readout Control Units (RCUs). The RCU communicates with all sub-systems, in particular with the Timing, Trigger and Control (TTC) system, which provides each RCU with the 40.08 MHz LHC clock, which is used as a system and sampling clock in TPC readout electronics. The LHC clock and trigger data are sent over the TTC fiber using 80 Mb/s Time Division Multiplexed BiPhase Mark encoded signals. It is important to have a radiation tolerant solution to recover the clock with low jitter and with a predefined phase-offset to the LHC input clock. Presently, this is handled by the TTC receiver (TTCrx) ASIC sitting on the RCU.

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First irradiation tests results of the ALICE TPC Readout Control Unit 2

Cited by 5 publications

References 9 publications

First performance results of the ALICE TPC Readout Control Unit 2

First performance results of the ALICE TPC Readout Control Unit 2

Upgrades of the ALICE TPC Front-End Electronics for Long Shutdown 1 and 2

Clock and data recovery methods for the readout control unit 2 in ALICE TPC

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