1. RD_FA : WP - 4
C. Chatterjee1, S. Dalla Torre, S. Dasgupta2, S. Levorato, F. Tessarotto, A. Valentini1
1 – new
2 – formally he cannot be list in 2018 (AIDA2020 postdoc)
RD_FA meeting, bologna 3-4/7/ RD_FA WP 4 Silvia DALLA TORRE

2. OUTLINE Reminding the context Activity: period 1/1-30/6/2017
Activity planning: period 1/7/ /12/2018
Financial requests, preliminary
RD_FA meeting, bologna 3-4/7/ WP Silvia DALLA TORRE

3. RICHes (and TPC) for EIC
The setup designs are still subject to important evolution, nevertheless
About 2 crucial elements related to our direct interests
RICHes (high & low momenta) are necessary:
Our main focus
TPC is the central tracking element
Synergies with studies for RICH applications (IBF, miniaturized pads)
All this matches our fields of expertise:
RICH detectors
MPGDs (the up-to-date approach to high-rate TPC read-out)
RD_FA meeting, bologna 3-4/7/ WP Silvia DALLA TORRE

4. HIGH p RICHes Starting point of our R&D activity for EIC
HIGH-p: PID in the range 6 < p < 60 GeV/c
Radiator: gas is mandatory
Collider implementation: short (~ 1 m) radiator length
Two possible ways, both requiring deeper exploration
High pressure, studied for ALICE upgrade VHMPID
Towards the very far UV with window-less approach (prototype tested at Fermilab)
In both approaches gaseous photon detectors have been used
Starting point of our R&D activity for EIC
RD_FA meeting, bologna 3-4/7/ WP Silvia DALLA TORRE

5. SYNERGIES CSN 1 CSN 5 Non-INFN founds
The starting point is the development for COMPASS RICH upgrade
Construction completed, commissioning on-going
Cultural synergies with the RD51 networking activities
CSN 5
MPGD_NEXT, in particular task 4 – High-gain hybrid MPGD
jobs: development of THGEM technologies towards large gains
Non-INFN founds
AIDA2020, WP13 – Innovative gas detectors, task
Overlap with MPGD_NEXT, task 4
EIC R&D (within the ED6 Consortium)
Overlap with RD_FA, WP4
RD_FA meeting, bologna 3-4/7/ WP Silvia DALLA TORRE

6. OUTLINE Reminding the context Activity: period 1/1-30/6/2017
Activity planning: period 1/7/ /12/2018
Financial requests, preliminary
RD_FA meeting, bologna 3-4/7/ WP Silvia DALLA TORRE

7. R&D planning within RD_FA
Planning over 3 years
4 R&D items illustrated in the following slides
REMINDER (presented last year)
RD_FA meeting, bologna 3-4/7/ WP Silvia DALLA TORRE

8. THE STARTING POINT: COMPASS RICH-1 UPGRADE
The detector architecture
each 600 x 600 mm2
detector consists of two modules having 600 x 300 mm2
RD_FA meeting, bologna 3-4/7/ WP Silvia DALLA TORRE

9. THE STARTING POINT: COMPASS RICH-1 UPGRADE
The bulk MICROMEGAS with resistive anode and capacitive coupling R-O
PCB
0.15 mm
fiberglass
Single pad
HV is applied here through a resistor ground)
Signal read-out from this pad HV
0.5 GW
Resistor arrays
Connections for groups of 48 pads
Signals
RD_FA meeting, bologna 3-4/7/ WP Silvia DALLA TORRE

10. TOWARDS MINIATURIZED PAD_SIZE
development of resistive MM by discrete elements with miniaturized pad-size
pad-size: 8 x 8 mm2  3 x 3 mm2 (3.5 mm pitch)
prototype active area: 10 x 10 cm2
easy expandability of the active surface:
all the detector services (read-out FE cards, resistor boards) included in the active surface
Modular design based on groups of 128 pads (16 x 8)
Connector selected: SAMTEC, FTE series
RD_FA meeting, bologna 3-4/7/ WP Silvia DALLA TORRE

11. TOWARDS MINIATURIZED PAD_SIZE
The design of the prototype of the resistive MM by discrete elements with miniaturized pad-size
RD_FA meeting, bologna 3-4/7/ WP Silvia DALLA TORRE

12. TOWARDS MINIATURIZED PAD_SIZE
In parallel, prepare for the prototype read-out:
By the SRS (Scalable Read-out System), FE: APV25
Development of the DAQ software and test with an existing prototype
Stage: M. Baruzzo
RD_FA meeting, bologna 3-4/7/ WP Silvia DALLA TORRE

13. OUTLINE Reminding the context Activity: period 1/1-30/6/2017
Activity planning: period 1/7/ /12/2018
Financial requests, preliminary
RD_FA meeting, bologna 3-4/7/ WP Silvia DALLA TORRE

14. ACTIVITY PLANNING
2017: complete the design and build the MM prototype with miniaturized pad-size, as foreseen
2018:
Complete the prototype construction and its characterization, as foreseen
Start a new strategic activity and, therefore, postpone starting the other R&D items
on going
New
activity
RD_FA meeting, bologna 3-4/7/ WP Silvia DALLA TORRE

15. NEW STRATEGIC ACTIVITY
47 % (!)
CsI, the only standard photoconverter compatible with gaseous atmospheres, has problematic issues, main ones:
It does not tolerate exposure to air (water vapour, O2)
Ageing by ion bombardment
NEW !!! (see Antonio Valentini’s talk)
Photocatodes: diamon film obtained with Spray Technique making use of NC powder
Spray technique: T ~ 120° (instead of ~800° as in standard techniques)
L.Velardi, A.Valentini, G.Cicala, Diamond & Related Materials 76 (2017) 1
For next year, we are planning a very basic set of studies:
to compare the QE of photocathode samples in vacuum and in different gaseous atmospheres;
to realize a photon detector prototype with a photocathode using as substrate a THGEM and to characterize it;
to perform a preliminary ageing study measuring the QE before and after collecting defined amount of charge at the photocathode itself. 15
RD_FA meeting, bologna 3-4/7/ WP Silvia DALLA TORRE

16. OUTLINE Reminding the context Activity: period 1/1-30/6/2017
Activity planning: period 1/7/ /12/2018
Financial requests, preliminary
RD_FA meeting, bologna 3-4/7/ WP Silvia DALLA TORRE

17. RICHIESTE FINANZIARIE
Necessita’ di missioni ~ 10 k€
Material procurement
Viaggi in USA
Riunioni in Italia
Necessita’ di consumi ~ 20 k €
THGEMs to be used as ND photocathode substrates
Cell (mechanics, connectors, gas connections, mechanical frames) to test the sample photocathode comparing measurements in vacuum and in gaseous atmospheres
ND powder samples
Preparation and analysis of metallographic specimens to study the ND distribution in the holes of the THGEM substrate
Material transportation BARI-TRIESTE
Gas bottles to operate the detectors
Miscellanea of small items
PRELIMINARY !!!
RD_FA meeting, bologna 3-4/7/ WP Silvia DALLA TORRE