Molecular Beam Epitaxy Shutter System By: Sebastian Munoz University of British Columbia August 25 2012

Introduction The following presentation illustrates the design of the Molecular Beam Epitaxy (MBE) Shutter System. This document contains the information necessary to build the system. Such information includes the technical drawings for the custom made components, as well as the bank of parts for each component. The purpose of this project was to create a simple system that actuates at a fast rate and that is easy to assemble.

Setup of the MBA Shutter System

Shutters The MBE Shutter System uses 2 types of shutters. Five of the six shutters are type B and only one is type A These shutters are activated by the puling motion of six 25lb force pneumatic actuators The shutters have a self-close mechanism caused by the energy stored in the torsional springs. Type A Type B

Shutters The shutters are made out of several components: Shutter Seal Anchoring Base 2mm diameter, 304 stainless steel shaft 1/16" thick Viton Fluoroelastomer Rubber 304 stainless steel retaining rings Type 316 stainless steel, M2 and M3 machined screws and nuts Type 302 Stainless Steel, 270° Deflection Angle/Degrees of Rotation with 0.218 in – lbs of torque ***Note: Both Types of shutters share the same shutter seal

Type A Shutter ITEM NO. PART NUMBER DESCRIPTION QTY. Provider 1 Anchoring Base Type A 316 Stainless Steel In House 2 Shutter Seal 3 SSFRRA2-33.0-B2-S2 Type 304 Stainless Steel, Rotary Shafts - Retaining Ring Grooves on Both Ends - with retaining rings Misumi 5 9287K125 270° Deflection Angle/Degrees of Rotation Spring. Type 302 Stainless Steel McMaster Carr 6 Protectivie Viton Seal Corrosion-Resistant Viton® Fluoroelastomer Rubber/ 1/16" thick/ Part # 86075K22 7 93935A305 M2 Thin Hex Nut/ 316 Stainless Steel 8 91801A105 M2 Flat Head Phillips Machine Screws/4 mm Lg/ 316 Stainless Steel 9 91801A111 M2 Flat Head Phillips Machine Screws/10 mm Lg/ 316 Stainless Steel 4 10 90116A155 M3 Pan Head Phillips Machine Screws/ 10 mm Lg/316 Stainless Steel 11 93935A320 M3 Thin Hex Nut/ 316 Stainless Steel **Note: The order of shafts include the set of 304 stainless steel external retaining rings

Type A Anchoring base

Type B Shutters ITEM NO. PART NUMBER DESCRIPTION QTY. Provider 1 Anchoring Base Plate 316 Stainless Steel 5 In House 2 SSFRRA2-36.0-B2-S2 Type 304 Stainless Steel, Rotary Shafts - Retaining Ring Grooves on Both Ends - with retaining rings Misumi 4 Protectivie Viton Seal Corrosion-Resistant Viton® Fluoroelastomer Rubber/ 1/16" thick/ Part # 86075K22 McMaster Carr Shutter Seal 6 9287K125 270° Deflection Angle/Degrees of Rotation Spring. Type 302 Stainless Steel 8 91801A105 M2 Flat Head Phillips Machine Screws/4 mm Lg/ 316 Stainless Steel 15 9 94150A305 M2 Thin Hex Nut/ 316 Stainless Steel 35 10 90116A022 M2 Pan Head Phillips Machine Screw/12 mm Lg/ 316 Stainless Steel 20 11 90116A155 M3 Pan Head Phillips Machine Screws/10 mm Lg/ 316 Stainless Steel 12 93935A320 M3 Thin Hex Nut/ 316 Stainless Steel **Note: The order of shafts include the set of 304 stainless steel external retaining rings

Type B Anchoring Base Plate

Shutter Seal

Viton Seal

MBE Pulley Mechanism The MBE shutter system also requires the assistance of two pulleys in the actuation of two shutters. This assembly has 4 main components: - Pulley Base - Rectangular Wire Holder - PTFE (Teflon) Pulley - Shoulder Screw

MBE Pulleys M2 Thin Hex Nut/ 316 Stainless Steel 94150A305 ITEM NO. PART NUMBER DESCRIPTION QTY. Provider 1 Pulley Base 316 Stainless Steel 2 In House Teflon Pulley PTFE 3 Rectangular wire holder 316 Stainess Steel 4 91801A107 M2 Flat head Screw 316 Stainless Steel/ 6mm Lg 6 McMaster Carr 5 97345A425 Shoulder Screw 316 Stainless steel / Shoulder Lg. 7/16" /#4-40 3458T89 Type 302 Stainless Steel Wire Rope/ 7 x 3 Strand Core 25 ft 7 94150A305 M2 Thin Hex Nut/ 316 Stainless Steel

Pulley Base

Rectangular Wire Holder

PTFE Pulley

Optical Window Assembly The MBE chamber has two optical windows The optical window assembly has three main components: - 316 Stainless Steel Retaining plate - Extreme Temperature Quartz Pure Glass - Corrosion-Resistant Viton® Fluoroelastomer Rubber

Optical Windows ITEM NO. PART NUMBER DESCRIPTION QTY. Provider 1 Optical Glass Retaining Viton 1/32" Think Corrosion-Resistant Viton® Fluoroelastomer Rubber 4 In House 2 Extreme Temperature Quartz Pure Glass 1357T41 McMaster Carr 3 Glass Support Plate 316 Stainless Steel 90116A015 M2 Pan Head Screw/8mm Lg / 316 Stainless Steel 6 5 94150A305 M2 Thin Hex Nut/ 316 Stainless Steel

Optical Glass Holder

Viton Spacer

MBE Shutter Pate

MBE Shutter Plate

CF Full Nipple Extensions In order to avoid any collisions between the shutter and the pneumatic actuators, two CF Full Nipple 1-1/3'‘ extensions were incorporated in the design.

CF Full Nipple Extension