(r15) SdHCal < CALICE

CALICE Web>CaliceDetectors>SdHCal (revision 15) (raw view)~~EditAttachPDF~~

---+ Semi-Digital Hadronic Calorimeter

---++ Introduction

One of the innovative concept to be fully tested by the CALICE collaboration is the one of a semi-digital hadronic calorimetry where the deposits from the hadronic showers are recorded with a fine (1×1 cm² cells, 40-50 layers) granularity with only a coarse energy information (2 - 3 thresholds). Based on gaseous sensor ([[Grpc][GRPC]] or [[MicroMegas][MICROMEGAS]] chambers) the proposed detector also includes, for the first time memory capable and power pulsed embedded readout chips.

This page present the effort of the [[#DhcalGroups][groups]] toward the construction and beam test of a full 1 m³ prototype, including most of the [[#IlcDependancies][dependancies]] implied by the running at the ILC, totalling 400000 channels.

---++ Detectors

---+++ <nop> MICROMEGAS

One possibility for a gaseous HCAL active medium is the Micro Mesh gaseous structure ([[MicroMegas][MICROMEGAS]]), a detector based on the micro-pattern detector technology, today widely used by many experiments: COMPASS, CAST, NA48, n-TOF, <nop>T2K and the ILC TPC project. First prototypes consist of a commercially available fine mesh which separates the drift gap (3 mm) from the amplification gap (128 &mu;m). This simple structure allows full efficiency for MIPs and thanks to thin pillars, provides a good uniformity over the whole surface. The rate obtained with Micromegas chamber is not constrained, as it is the case for the Glass RPC. Moreover the tiny size of the amplification avalanche, results in fast signals without physical cross talk and leads to low multiplicities. The chosen bulk technology based on industrial PCB processes, offers a robust detector with no working voltages higher than 500 V. [[MicroMegas][MICROMEGAS]] are therefore a very appealing possibility to equip a DHCAL optimized for the PFA. Reference Paper : MICROMEGAS chambers for hadronic calorimetry at a future linear collider C Adloff et al 2009 JINST 4 P11023

---+++ GRPC
   * Simple
   * Drawings
   * MultiLayers

---++ Electronics

---+++ Very Front-end Electronics

The readout will be done with embedded [[Glossary#HARDROC][HARDROC]] or DIRAC able to store the hits above 3 thresholds for 64 channels with very low consumption (using power pulsing techniques)

---+++ Digital Interface Electronics
   * DIF: Digital <nop>InterFace board
   * DCC: Digital Concentrated Card
   * LDA: Link-Data aggregator

---++ Data Acquisition

   * ODR: Off-Detector Receiver
The presentation of the SdHCal can be found [[DhcalMeetings][here]];

The DIF Geometry file (May & August ) : [[%ATTACHURL%/Slot1_39_Geom.txt][Slot1_39_Geom.txt]]

The Trivent Documetation : [[%ATTACHURL%/Trivent_user_manuel.pdf][Trivent_user_manuel.pdf]]
---++ Presentation in conference.

#IlcDependancies
---++ ILC dependancies
   * low consumption
   * Zero suppression
   * Differed readout
   * Excellent geometric resolution, suitable for the PFA techniques adopted by the ILD and SiD concepts.
#DhcalGroups
---++ Implied Groups
| *Group*  | *People* |
| IPNL - Lyon  | Christophe Combaret  |
| ^  | Gérald Grenier  |
| ^  | Robert Kieffer  |
| ^  | Imad Laktineh  |
| ^  | Nick Lumb  |
| ^  | Laurent Mirabito |
| ^  | Muriel Vander Donct  |
| ^  | Florent Schirra  |
| CIEMAT - Madrid | Mary-Cruz Fouz Iglesias |
| ^  | Enrique Calvo Alamillo |
| ^  | Jesus Puerta-Pelayo |
| ^  | Jorge Berenguer Antequera |
| IHEP - Protvino  | |
| LAL - Orsay  | |
| LAPP - Annecy  | Catherine Adloff  |
| ^  | Jan Blaha  |
| ^  | Sébastien Cap  |
| ^  | Maximilien Chefdeville |
| ^  | Alexandre Dalmaz |
| ^  | Cyril Drancourt  |
| ^  | Ambroise Espagilière |
| ^  | Renaud Gaglione |
| ^  | Nicolas Geffroy |
| ^  | Claude Girard |
| ^  | Jean Jacquemier |
| ^  | Yannis Karyotakis |
| ^  | Fabrice Peltier |
| ^  | Julie Prast  |
| ^  | Jean Tassan |
| ^  | Guillaume Vouters |
| LLR - Palaiseau  | Vincent Boudry |
| ^  | Khaled Belkadhi |
| ^  | Rémi Cornat |
| ^  | David Decotigny |
| ^  | Franck Gastaldi |
| ^  | Manqi Ruan |
| ^ | Yacine Haddad |

MailingList

   $ HARDROC: Hadronic RPC Detector <nop>ReadOut Chip, a very front-end readout chip
   $ DIRAC: DIRAC: DIgital Readout Asic for hadronic Calorimeter, a very front-end readOut chip

-- Main.VincentBoudry - 12 Sep 2008

Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who	Comment
txt	Slot1_39_Geom.txt	r1	manage	3.8 K	2012-09-13 - 10:49	HaddadYacine
pdf	Trivent_user_manuel.pdf	r1	manage	475.5 K	2012-09-16 - 00:39	HaddadYacine

Topic revision: r15 - 2012-09-16 - HaddadYacine

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