Progress Report (1/30/12)

Abdurahim Rakhman

(as of 1/30/12)

ILL Group Meeting, Penn State University

January 30, 2012

Abdurahim Rakhman Progress Report

Outline

1 Direct Laser Acceleration (DLA)

2 UV Pulse Stretcher (UVS)

Abdurahim Rakhman Progress Report

Vacuum Chamber

Thoroughly cleaned the interior & exterior with alcohol & Kim wipes

Blanks with O-rings have been attached to all the CF flanges

Rubber ring for the top lid still need to be finished by machine shop

Vacuum leak test have been postponed until the rubber is done

Two handles for the top lid still need to be made

01/19 01/27

Abdurahim Rakhman Progress Report

Hub Design & Parts List for Control System

Making a hub which connects the electrical units inside chamber to theoutside controllers

Parts list has been finalized & ordered this week

DA-15 Male

Front Panel Back Panel

Gas Valve

Power Connector

1 2 3

4 5 6

Communication Ports for

Alignment Stages

Connected to Vacuum

Electric FeedthroughWired Connection

RJ-22 Jacks3-pin Jack

Part Name Vendor Specs

Enclosure Box Digikey Aluminum Sheet, 5 × 3 × 4, thickness 0.064 in

DA-15 Male Connector Digikey 15-pin dsub

RJ-22 Jack Digikey Comm. Port Jack

RJ-22 Cable Digikey Strait Cable

PCB Board Digikey to mount RJ-22 Jack

3-Pin Pulse Valve Connector Digikey Connects to IOTA One Valve Controler

Standoff & Bolts & Nuts Digikey

Abdurahim Rakhman Progress Report

DLA

Completed:

Ordered the remaining parts for the gas transport system from GTS/Welco

Ordered parts for the hub used for alignment & gas control systemconnection from Digikey

To Do:

1 Vacuum chamber leak test possibly done this week

2 Finish the Labview control of three cameras w/ triggered mode

3 Work on the design of characterization of the converted radially polarizedfs pulse

4 Work on design of possible pulse compressor proposed in the DLA system

Abdurahim Rakhman Progress Report

Cross Correlator Preliminary Design

Collinear SFG of 800 nm + (300 ∼ 450 nm): BBO (Type I, o + o → e)UV pulse: 100 fs ∼ 50 ps, Red pulse: 40 fsSFG Output: 218 nm ∼ 288 nmTwo dichroic mirrors:

DM1: T @ 300 ∼ 450 nm, R @ 800 nmDM2: T @ > 300 nm, R @ 200 ∼ 290 nm

PMT: Hamamtsu, Solar blind, vacuum UV range (160 nm ∼ 320 nm)

SFG

M

MM

M

BBODM1

DM2

BD

300~450 nm

800 nm

218~288 nm

PMT

Abdurahim Rakhman Progress Report

UVS w/ Cross Correlator

Palitra

Trident X

SFG

BSM

M

MM

M

BBO

DM1

DM2

BDPeriscope

PMT

Abdurahim Rakhman Progress Report

Dichroic Mirror Choices

1. CVI-Melles Griot

2. Princeton Instruments

Abdurahim Rakhman Progress Report

PMT Choices from Hamamtsu

Part Number Range (nm) Max Response (nm) QE (%) Rise Time (ns)

R8486 115 - 320 200 25 2.2

R7154 160 - 320 230 30 2.2

R6354 160 - 320 230 35 1.4

R6834 160 - 320 240 30 4.0

R5916U-57 115 - 320 230 25 0.18

R1689-02 160 - 320 240 15 0.3

R6354 (w/ fused silica window):

Abdurahim Rakhman Progress Report

BBO crystal thickness

BBO dispersion length calculation:

IGVM (ps/cm) 30 fs 100 fs 50 ps

SFG @ 800 nm + 300 nm 12.5 24 um 80 um 40 mm

SFG @ 800 nm + 450 nm 4.01 75 um 249 um 124.7 mm

Abdurahim Rakhman Progress Report

UV Pulse Stretcher (UVS)

Completed:

Created a preliminary cross correlator design

Identified possible choices for dichroic mirrors & PMT

In Progress:

SFG efficiency estimation calculation of BBO is underway

To Do:

Finalize the cross correlator design by consulting w/ RT

Abdurahim Rakhman Progress Report