Status of the Clermont-Ferrand R&D works

Tilecal upgrade meeting at CERN (11 February 2015)François Vazeille on behalf of Clermont-Fd team

● Active Dividers: R&D completed (2 Tile Notes)● Mechanics: handling tools● Remote HV system● FATALIC project: see talk of Laurent Royer Here: Other Front End information

Very quick information

1

2

Mechanics● No progress since the Valencia meeting! No reply to the mails! but we made a mistake: we forgot Ilya in our mails. No discussions! … and some worries!

● Example of the Black Box in Bld 175 ▪ The Demonstrator Patch Panel is too large: Outside the standard envelops ▪ Instead of revising its design Machining of the Black Box entrance specially designed to reproduce/test the envelop (so we loose the check of the envelop when inserting the Drawer).● How to do?

Proposition: to appoint a coordinator of the Mechanics outsidethe 3 concerned Institutes (Barcelona, Bucharest, Clermont-Ferrand).

Tile Module envelop

We are always ready to modify our Slider by integrating the Barcelona services.

3

Remote HV system● Tile Note in discussion with Godfather: Sergei Chekanov Reviewers: Gary Drake and Oleg Solovyanov.

● Tests of the HV noise at the read out level (started on Monday)

Three kinds of results from the recorded data:

▪ Stability of the applied HV from DCS data: RMS of applied HV. ▪ Integrator data: we have to find a way to quantify the noise. ▪ Read-out data: easier to quantify the noise.

Noise = sqrt[ (/µ)HV 2 - (/µ)0 2 ]

with (RMS) and µ (Mean) of readout pedestal distributions with/without HV.

4

LPC

● Demonstrator set-up

ANL LPCANL

PatchPanel

- Two Mini-Drawers max/option.- For the Remote LPC option: one 100 m long cable is available Separated tests of Drawers 1 and 4.- Active Dividers everywhere … but for some locations to locate precisely.

Data

LPCANL

- Data just taken.- Results as soon as possible.- Only some indications here.

5

- No ANL/LPC comparison here: it will be discussed in a next meeting: only some LPC results.

- Very good HV stability

Example of Drawer LPC 1 for a short test of about 44 minuteswith HV Opto channels 0-11 (re-labelled to fit readout labels).

11 10 9 8 7 6 5 4 3 2 1 O0.052 0.053 0.050 0.052 0.062 0.050 0.033 0.060 0.047 0.054 0.047 0.056

ChannelRMS (V)

rms from 33 mV to 60 mV

6

Other Front End information● See the talk of Laurent Royer about the status of FATALI, All-in-One and Main Board 0.

● Review of the Black Box in the Bld 175 (Roméo Bonnefoy) light tightness and safety of PMTs are two main concerns.

Mounting of a black cover,but not enough at the right

Repairs of µ-switchesof the interlock chain(µ-switches in contact with the retractable black sides)

Interlock connector:should be connected to HV Source

7

● 3-LED set-up for Front End tests

▪ Goals: FE realistic tests with Signal, Min Bias et Pile-up, with possibilities of playing with amplitudes and timing’s.

▪ Experimental lay out: Signal 1 (physics) + Signal 2 (pile-up) + DC (Min B.)

PMT BlockMainBoard

PCvia

Interface

HV

LV

Driver1

Driver2

DCPulseGener

.

DelayMechanicalsupportwith avec LEDs motion

132

8

9

▪ Plan of measurements to do at 690V (February-March)

- Noise without LED Pulses.- Pulses 1 alone synchronized with Clock, then shifted of ±3 ns, of various amplitudes to emulate the 3 gains.- DC 3 alone: obviously the high gain.- Pulses 1 + DC 3, with Pulse 1 conditions above.- Pulses 1 and Pulses 2 shifted of ±25, ±50 and ±75 ns.- Idem with Pulses 1 shifted of ±3 ns.- Pulses 1 and Pulses 2 shifted of ±25, ±50 and ±75 ns + DC 3.- Pulses 1 shifted of ±3 ns and Pulses 2 shifted of ±25, ±50 et ±75 ns + DC 3.

This set-up could be used by the 3 optionsand lent to the Institutes

Comments:- Simulations of ANL shown this morning very useful for the DC 3 level.- Linearity tests over the whole dynamics made at CERN with the

Laser.- In case of difficulties for tests at low LED amplitude (Bad Driver

working), use of filters in front of LEDs to build low signals. - For very high signals, possibility of increase the PMT HV, after the check that the shapes are unchanged.- Data analyzed with the optimal filtering (with/without iteration).

10

● Comparison of the options

Dedicated tables of issues will be submittedsoon to the collaboration.

● Availability of a Daughter Board at Clermont-Ferrand strongly expected … event though it is not the final version.

¬ We have to learn many things, including its link/working with the VC707 interface.¬ Waiting for its delivery, we are obliged to replace it by Clermont-Fd interfaces … not suited to the Test Beam works. The schedule towards the Test Beam is very tight!