Straw electronics status Signal generation and formation in straw Webs + Cover Backend TTC Services + DCS New engineer on VIA program Georgios

Konstantinou (Giorgio)

Signal creation and formation Ongoing studies

single straw test bench and simulation

Straw transfer function very complex (SPICE not enough)

Frequency dependence must be taken into consideration

‘Signal stretching’ caused by straw Need more work on this

Web + covers Reminder

We had ‘old’ 50pin connector covers and webs Decision to make web shorter and change connector to 100 pins to address intermittent

noise problem This meant new readout chain

To be able to verify new web performance soon, intermediate web short but with 50 pin connector so the old readout could be used

New covers not compatible with the old readout Webs

Left and right intermediate 2 pieces of each Assembled and mounted on the detector prototype Serious tests impossible due to connectors misalignment

Left and Right active In the first round problem HV, trace too close to HV via New production of 8 pieces each Main reason to change the web was the proximity of the flex part and manifold wall (even touching)

The new manifold is smaller and again close to web Need careful verification

Left and right passive (termination) After simulations and measurements they are not mounted anymore

Better signal-to-noise ration Better time resolution

Covers production and testing New covers with

New 100 pin connector to web On-board TDC Connection to backend via ethernet cable with serial links

3 pieces of both produced and ready for tests Finalizing cover and SRB firmware now

FPGA on cover with control, TDC and serial links Start tests with CARIOCA this week Mount 2/4 covers on prototype beginning January 1 month tests to check the noise and time-measurement

performance At least 1 more iteration will be needed

‘writing’ on the copper under o-ring compromises gas tightness

Maybe need to change schematics for remote reprogrammability (to be checked soon)

If there is no other serious change ~ 2 days redesign Prototype production beginning February 2012 20 pieces each type Part of the total order of ~250 pieces

Backend Scaled SRB prototype

Designed to be able to readout 4 old covers 4 new covers

Buffer for ~100,000 events TTC interface with TTCRx and clock

cleaning by QPLL Number of extra NIM and LVDS

input/outputs for synchronization and other (unforeseen) functions

Board ready Firmware development slower then

expected (me + Giorgio) Problem with SBC Giorgio’s start with NA62 links Long ‘learning’ curve for new technology

(high speed links in ALTERA chip without HW support)

Gaining speed now The first version ready with FIFO

buffering for data; few 100s of events Need to add big memory for 100,000

events

Backend Established serial link

connections See control words This week test sending

commands and read data Ethernet cable is 2 meters

long now, will check maximum possible length (5 meters from rack to chamber)

Giorgio’s presentation on link status

Beginning January ready for tests with 64-straw prototype Noise scans to check new

cover Cosmics with micromegas to

check TDC No showstopper till now

Backend Full SRB prototype

Start design immediately after experience from small SRB with straw prototype

Changes if needed 15 inputs for half view readout Bigger memory for online monitoring High speed output for TEL62

2.4Gbit link using ethernet cable tested by Andrea and Giorgio Necessary to use shielded cable 10 meters with better then 10**13 BERR Giorgio’s presentation

Start February, ready June 2012? Mezzanine for TEL62

Need to design, produce and test a mezzanine with 12 high speed serial links (12 SRBs sending data to TEL62)

Design Peter + Giorgio Starts when finished scaled SRB firmware Start ~February, ready June 2012

Mezzanine firmware Giorgio

Backend TEL62

Need 4 pieces It should be placed close to the detector Straw specific firmware Peter + Giorgio 1 TEL62 crate ordered Do we need 1 crate per TEL62 or can we have longer links (30-40meters) and have 1

crate with 4 TEL62? SBC

We took the last VP-317 from the POOL Problems with stuck A24 bit Checked with SBC support After few manipulations the problem disappeared itself Electro-mechanical (contact)?

End of production We need to go for VP-7XX

No order till now as big experiments are not interested yet Need at least 1 piece this year Limitation on VME space

HW OK Coming from BIOS Negotiate special BIOS with company?

TTC 2 sets of LTU+TTCex ordered

TTCex has got a problem with clock startup phase Not usable for final application Asked for 1 temporary module for lab tests

Services + DCS

Racks Each chamber has got 1 rack Should be less then 5 meters from the chamber

due to cables between cover and SRB Real limit not known yet

1 VME 9U crate for SRBs + SBC 2 MPOD crates

1 needed at the moment Spare place for 1 more depending on frontend

electronics 1 TEL62 crate?

Services + DCS Bulk power supply

MPOD system from Wiener ESE-BE (POOL) group did a lot of testing and evaluation Hardware very good OPC server not stable for HV part Tomorrow meeting and prepare response to Wiener Continue with MPOD and press Wiener to fix the problem

CAEN Combination of 3 different crates 2.5-3 times more expensive then MPOD, extra crates , etc CAEN proposes to use their new system which should appear soon

Similar to MPOD Again new product problems as with MPOD

Follow this path to have another solution Waiting for CAEN offer (2 months already!)

Combination of Wiener and CAEN systems 2 crates instead of 1 Possible solution

We do not plan to have a final bulk PS in technical run

Services + DCS Patch panels

LV and monitoring PP Switching covers PS on/off, monitoring voltages, currents, temperatures on covers

and detector Design finished Layout proceeding now Production January ELMB based control

Should have a CERN support Would like to include it in DCS in June run as it is a special straw equipment

HV PP with HV relays to be able to switch-off cells with a problem Relay indentified (~17 Euros) Controlled by ELMB (need more ELMBs)

Using ELMB serial link port Controlling EPLD (MAX2) chip on PP Triplicated registers for HV safety

Design expected half January Layout till end of January Production February Would like to test it in June technical run

Summary Straw + CARIOCA response understood better now but need more work still Cover+web test is critcal

Noise + TDC performance SRB firmware delayed but in a good shape now Full readout system (web+cover+SRB) ready in January Depending on the tests with 64-straw prototype

Go to production status Or study the problem and modifications

If OK, order prototype series of covers and webs (20 pieces) as a part of full order (~250 pieces each) February

Full SRB and mezzanine in June but not clear if ready for tests with TEL62 Firmware ? We can use scaled SRBs and readout 8 covers Missing TEL62 probably not a problem as straw is not participating to trigger yet

Straw specific DCS components (Patch panels) ready for June and tried with global DCS

Bulk power supplies decision postponed