Development of Tera-pixel Digital Calorimeter

for the International Linear Collider

Abstract

20 GeV

single e-

20 GeV

single -

15m silicon sensitive thickness

50m X 50m cell size

Minimum Ionization Particle's peak

25mx 25m

50m x 50m

400m x 400m

100GeV single e-

15m silicon sensitive thickness

Charge sharing at cell boundary.

Multi particles in a cell increase the tail.

20 GeV single e-

60 GeV single e-

100 GeV single e-

15m silicon sensitive thickness

50m X 50m cell size

Similar distributions for different energies except for numbers of hits.

One particle per cell

Digital calorimetry

Linearity for energy measurement

Individual secondary particles are detected

after electromagnetic shower cascades !!

Energy deposit

Incoming energy dependence

Counting number of cell hits corresponds to measuring energy.

Science and society

Conclusion

Introduction

We have implemented digital calorimeter geometry in GEANT4 full detector simulation.

We can realize a digital calorimeter with using an order of 50m X 50m cell size.

GEANT4 full detector simulation shows linearity for electron shower energy measurement.

International Linear Collider

Energy frontier of particle physics

High granularity calorimetry

Detection of individual particles after electromagnetic shower by small cells

Digital Calorimetry

Cost saving

Using CMOS (complementary metal oxide semiconductor) silicon

Cheaper than pure silicon

ZOOM

large cells

larger cells

small cells

small cells



shower particles

single particle

Cell size dependence

28th November 2006 at House of Commons

50mm X 50mm cell is a reasonable size.

Particle physics tries to understand age-old questions regarding the very nature of the

smallest constituents of all matter. The digital electromagnetic calorimetry is a new concept

and an ideal device for the investigation. It makes use of leading-edge developments in

technology, and if realized, it could have wider applications in industry as well as for

fundamental physics studies.

2006-11-24T16:15:19