DTC optimization

Geometry and segmentation optimization of the Digital Tracking Calorimeter

Optimization philosophy

Geometry

Materials

Software

The software for this project is Gate installation and the DTC toolkit. For a complete guide to use the software for optimization, see the page Software for design optimization.

Results

Resolution

All following values are given in units of Water Equivalent Thickness! (Except the absorber thicknesses)

How many layers are needed?

Pre-straggling resolution is the contribution to the total resolution from the detector smearing. This is calculable because we know the range straggling from Monte Carlo simulations, and the pre-straggling resolution is a subtraction in quadrature.

Material	Thickness	[math]\displaystyle{ t / \sqrt{12} }[/math] WEPL	Resolution	Excess straggling	Pre-straggling resolution	Layers for 230 MeV + [math]\displaystyle{ 5\sigma }[/math]
Al	2 mm	1.5 mm	4.16 mm	6.1%	1.38 mm	67
Al	3 mm	2.1 mm	4.26 mm	9.2%	1.69 mm	48
Al	4 mm	2.7 mm	4.35 mm	12.4%	1.97 mm	39
Al	5 mm	3.3 mm	4.50 mm	16.4%	2.28 mm	32
Al	6 mm	3.9 mm	4.70 mm	23.3%	2.73 mm	27
Al	7 mm	4.5 mm	4.76 mm	26.0%	2.78 mm	23
Loma Linda	N/A	N/A	4.1 mm*	N/A	N/A	N/A
FOCAL	32 mm	9.2 mm	15.6 mm**	N/A	N/A	11

* At 200 MeV. Scintillator measurements, res. does not scale linearly with depth.
** Resolution scaled to 230 MeV from 188 MeV