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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