A CCD detector array for direct ion measurement - Harsh ...
A CCD detector array for direct ion measurement - Harsh ...
A CCD detector array for direct ion measurement - Harsh ...
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CMS Field Products<br />
A <strong>CCD</strong> Detector Array <strong>for</strong><br />
Direct Ion Measurement<br />
Gottfried Kibelka<br />
O.I. Analytical, CMS Field Products<br />
Pelham, Alabama<br />
The 5th <strong>Harsh</strong>-Environment Mass Spectrometry Workshop<br />
September 20-23, 2005<br />
Sarasota, Florida
Mattauch-Herzog MS<br />
CMS Field Products<br />
φe = 31.8°,<br />
α = 90°,<br />
Source<br />
Electrostatic<br />
Sector<br />
Magnetic<br />
Sector
The 1” Focal Plane MS<br />
CMS Field Products<br />
~4”<br />
1”
How to create a Spectrum ?<br />
CMS Field Products<br />
m<br />
z<br />
=<br />
B<br />
2<br />
r<br />
2V<br />
2<br />
Changing B magnetic field (slow)<br />
Changing V accelerat<strong>ion</strong> voltage (scanning)<br />
Collecting all r<br />
<strong>array</strong> <strong>detector</strong>
Ion Detect<strong>ion</strong><br />
CMS Field Products<br />
Simultaneous detect<strong>ion</strong> of all m/z<br />
o Ions of all m/z focused onto a plane<br />
o Non – scanning<br />
o Improved duty cycle<br />
Need <strong>for</strong> <strong>array</strong> <strong>detector</strong><br />
o Strip Charge Detector Array<br />
o Faraday Cup Array<br />
o Electro Optical Ion Detector<br />
o Charge Coupled Device
Ion - <strong>CCD</strong><br />
CMS Field Products<br />
•Includes shift register and amplifier<br />
•Eliminates Multiple Convers<strong>ion</strong>s<br />
•No post accelerat<strong>ion</strong> of e-<br />
•Extremely low noise floor<br />
•Fine resolut<strong>ion</strong> pixel pitch 20 µm<br />
•1” 1286 <strong>detector</strong> elements<br />
•2” 2598 <strong>detector</strong> elements
<strong>CCD</strong> unit cell<br />
CMS Field Products<br />
Electrode (<strong>detector</strong> element)<br />
Light sensitive layer<br />
replaced with MOS<br />
DOD<br />
DC 1<br />
Reservoir<br />
Signal<br />
DC2<br />
Well<br />
Transfer Gate<br />
Biased gates create<br />
potential wells<br />
appropriate clocking<br />
Stores or moves<br />
collected charge<br />
Serials
<strong>CCD</strong> - Spill and Fill<br />
CMS Field Products<br />
DOD<br />
DC 1 Reservoir Signal DC2 Well TG Serials<br />
Reset Detector Elements<br />
Fill Reservoir and Remove excess charge<br />
Collect Ions and store charge
<strong>CCD</strong> - Spill and Fill continued<br />
CMS Field Products<br />
DOD<br />
DC 1 Reservoir Signal DC2 Well TG Serials<br />
Empty wells and Transfer charge to serials<br />
Go to reset
Detector board<br />
CMS Field Products<br />
1” <strong>detector</strong><br />
2” <strong>detector</strong>
R&D System<br />
CMS Field Products
n-Hexane in Helium 100ms frame<br />
CMS Field Products<br />
signal int.<br />
0.55<br />
0.5<br />
0.45<br />
0.4<br />
0.35<br />
0.3<br />
0.25<br />
0.2<br />
0.15<br />
0.1<br />
0.05<br />
1 151 301 451 601 751 901 1051 1201 pixel
0.39<br />
n-Hexane<br />
fragment group 39 to 44amu<br />
CMS Field Products<br />
0.34<br />
0.29<br />
signal int.<br />
0.24<br />
0.19<br />
0.14<br />
0.09<br />
0.04<br />
450 500 550 600 pixel
1<br />
0.9<br />
0.8<br />
0.7<br />
0.6<br />
0.5<br />
0.4<br />
0.3<br />
0.2<br />
Xenon<br />
CMS Field Products<br />
129 131<br />
132<br />
64.5 65.5 66 67 68<br />
0.085<br />
0.08<br />
0.075<br />
65 66 67 68<br />
0.07<br />
0.065<br />
0.06<br />
0.055<br />
400<br />
402<br />
404<br />
406<br />
408<br />
410<br />
412<br />
414<br />
416<br />
418<br />
420<br />
422<br />
424<br />
426<br />
428<br />
430<br />
432<br />
434<br />
436<br />
438<br />
440<br />
442<br />
444<br />
446<br />
448<br />
450<br />
452<br />
454<br />
456<br />
458<br />
460<br />
462<br />
464<br />
466<br />
468<br />
470<br />
0.05<br />
0.045<br />
0 200 400 600 800 1000 1200 pixel<br />
signal int.
Hexane in Helium<br />
CMS Field Products<br />
0.6<br />
signal/ Volt<br />
0.5<br />
0.4<br />
0.3<br />
0.2<br />
100ms<br />
80ms<br />
60ms<br />
40ms<br />
20ms<br />
10ms<br />
0.1<br />
0<br />
1 101 201 301 401 501 601 701 801 901 1001 1101 1201<br />
<strong>CCD</strong> pixel
R&D System<br />
CMS Field Products<br />
•Sector field MS (350 amu)<br />
•pumps and power supplies<br />
onboard<br />
•25 cm x 61 cm X 35 cm<br />
•Complete system 16 kg<br />
•50 Watts power<br />
•<strong>CCD</strong><br />
•Array <strong>detector</strong><br />
•Resolut<strong>ion</strong> < 1amu<br />
•Full mass spectra in 10 ms<br />
•100 % Duty cycle
What is left to do<br />
CMS Field Products<br />
•<strong>CCD</strong><br />
•What pitch is needed?<br />
•What applicat<strong>ion</strong>s ?<br />
•Sensitivity<br />
•Noise<br />
•Stability<br />
•Aging<br />
•Deposits
CMS Field Products<br />
The presented development is based on<br />
patents licensed from JPL<br />
Mark Wadsworth and Mahadev Sinha<br />
The R&D team at<br />
OI Analytical /CMS Field Products
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