MUD new geometry installation

Acfa-Sim-J meeting 2006/01/25Hiroaki Ono

Niigata University

MUD new geometry

• MUD geometry was change and follow the Yamaoka-san’s new geometry design.– Dodecagonal shape (12-gon shape)

• Change parameter fNTraps from 8 to 12. – 9 Layers 　

• Change parameter fNLayers to 9.– 765cm Height, 800cm Half length of Z– Additional options to switch front layer to active l

ayer or absorber • Change fIsFrontActive to true or false

Yamaoka-san’s new geometry design

http://ilcphys.kek.jp/meeting/lcdds/archives/2006-01-19/DOD-MagStr-Ver2.pptYamaoka-san’s DOD meeting transparency page 2 middle figure.

Active layer : 9 LayersDodecagonal shape (12-gon)

Geometrical overlap in phi direction

• Geometrical overlap in phi direction placement happened if we set Decagonal shape (10-gon) or another shape exclude 8, 12, 16 –gon case.

• It seems to be a calculation precision error for sine or cosine in placement.– Add tolerance (0.1rad) in phi rotate placement.– Now it support grater than 6-gon shape.

New MUD Jupiter geometry

9 layers, 12-gonal shape

Difference of design and Jupiter geom

800 cm

765 cm

9 layers, Absorber thickness

Switch front layer to active