Summary of the CHOD working group

Siena, NA62 Collaboration meeting – Plenary meeting31/08/2012 1

Summary of the CHOD working group

Mauro Piccini on behalf of the “Old CHOD” team(Giuseppina Anzivino, Marco Bizzari, Antonio Cassese, Patrizia Cenci,

Viacheslav Duk, Monica Pepe, Roberto Piandani, M.P., Antofranco Piluso, Mauro Raggi, Cristiano Santoni)

Siena, 31st of August 2012

NA62 Collaboration meeting


Summary of talks The first NA62 dedicated CHOD section, mainly on the old CHOD:(summary on dry run activities)

• Status of the hardware by Viacheslav Duk

• Test of electronics boards (LAV FEE and TDCB) by Roberto Piandani

• Status of the CHOD decoding by Antonio Cassese

• Progress on the firmware to generate L0 trigger primitives from CHOD by Cristiano Santoni

But also a talk on the new CHOD by Vladimir Obraztsov

Note from Italo concerning the geometry of LAV12 and of the new CHOD


Old CHOD status After dry run:

All channel powered, tested and connected to the readout

All the electronics in place, cabling completed

The complete chain has still to be tested, firmware has to be completed and improved, as well as the software running on the online PCs

4

Plan

1. New HV cabling2. Signal cables: from the patch

panel to the TEL62 board3. CHOD signals from cosmics4. Conclusions

28.08.2012 V.Duk, INFN Perugia

By Viacheslav Duk

5

New HV cabling


Cables go outside the rack

CHOD H-plane

CHOD V-plane

SAC (8 cables)

Problems with fixing the modules: to be solved after the Technical Run

6

Patch panel


From the detector side (BNC) From the rack side (LEMO)

7

LAV FEE


LAV FEE from the back:Signal 16-channel cables

LAV FEE front:DCS ethernet cables

in the end of the Dry Run: no input cable 4 ethernet cables the last board terminated

8

From LAV FEE to TEL62


32-channel cables and supportsTDCB input sockets

9

Signals from cosmics


Signals from all channels observed at HV=1800V

Signal equalization will be done in October (starting from HV known from the previous runs)

100mV per division

10

TDCB mapping


TDC number

Socket number

quadrant

TDC0

0 V1

1 V4

2 H1

3 H4

TDC1

0 V2

1 V3

2 H2

3 H3

TDC2

TDC3

TDC

1

2

3

0

TDC0

TDC1

H4 V4

V1 H1

H3

V2

V3

H2

1

2

4

3

CHODbeam


L0 by CHOD Technical run will give a good opportunity to test the firmware developed by Cristiano S. for the generation of the L0 trigger primitives inside the TEL62.

By the way it is also mandatory to have a low level trigger by CHOD already working at the early stage of the technical run.

We can exploit the analog sums available in LAV FEE board to setup abasic trigger distributed to the talk board via a lemo cable.A NIM create and few modules (discriminators, coincidences) will make the job.

Main issue: Timing of the signals before to search for coincidences between horizontal and vertical plane


Talk by R. Piandani


Talk by A. Cassese

Siena, NA62 Collaboration meeting – Plenary meeting

31/08/2012 19

Talk by V. Obraztsov

Summary of the CHOD working group

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