CEDAR Support Structure and PMT Test

CEDAR Support Structure and PMT Test

Peter SutcliffeBirmingham1st Sept 2011

Proposed CEDAR Concept Design

Existing PMT Head

Insulation (all yellow parts)

New Detector Support

Detector Frame

Cooling and Electronics

Light Guide

Mirror

N2 Environmental Casing

Shortened Dimension 843mm

PMTs

Latest Version...Mainly Prototype

General View of Mirrors

New Alum split support tube surrounds existing PMT Head

Mirror fixed to the support tube

Some Adjustment needed at prototype stage

Edmund Optics Lens R45-371Dia 75mm, FL 200mm, Rad 103.36mm4 on orderTo be Al coated at CERN

General Section

Light GuideNew 8 X 4 Array

Light Guide made of Aluminium and to be wire eroded at Liverpool.

Complicated process of manufacture, but planning is well under way.

Test pieces of cone have been made.

Burnishing tool is on order, delivery this month.

Test pieces in new materials to be assessed: Copper with Chrome

Plating Stainless steel to be

burnished

PMT Test at CERN October Aluminium short tube which

will screw directly onto existing Quartz window holder and fixed into one of the 8 existing PMT positions.

Detail of PMT holder Aluminium short tube PMT holder and 37°

polished cone ‘Top Hat’ to house PMT Electronics

arrangement..TBD.

Quartz window Holder (existing)

New PMT Tube (Brass)

New PMT Holder

New PMT Holder(insulator)

PMT

Lock Nut

PMT Locking Plate

PMT

Exploded View