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Philips CM12 - page 1
Philips CM12 (S)TEM Alignment & Setup Manual ...
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Philips CM12 - page 2
Erwin Sabio Philips CM12 Alignment & Setup Manual Page 2 ...
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Philips CM12 - page 3
Erwin Sabio Philips CM12 Alignment & Setup Manual Page 3 Table of Contents Parts of the CM12 4 The Microscope The Control Panels The Specimen Holder The Side Entry Specimen Chamber St art-up Procedure 7 Powering up the Microscope Saturating the Filament Column Alignment 9 Centering the Beam Alignment of Thermionic Gun Condenser Aperture Adjustm ...
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Philips CM12 - page 4
Erwin Sabio Philips CM12 Alignment & Setup Manual Page 4 Parts of the CM12 The Microscope Figure 1 T he Philips CM12 (S)T EM Microscope 1 Electron Gun A filament tip (LaB 6 in this c ase) that em its electrons upon application of electrical current. 2 Condenser Aperture Assembly An area that houses t he condenser apert ure, control knobs, and r ...
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Philips CM12 - page 5
Erwin Sabio Philips CM12 Alignment & Setup Manual Page 5 The Control Panels Left Control Panel Figure 2 T he Control Panel located to the left of the microsc ope column. Right Control Panel Figure 3 T he main control panel on the r ight hand side of th e microscope. 9 Intensity Knob 16 Emission Meter 10 Fine Adjustment Knob 17 High Tension Butt ...
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Philips CM12 - page 6
Erwin Sabio Philips CM12 Alignment & Setup Manual Page 6 The Specimen Holder Figure 4 T he CM12 Specimen Holder 22 Black Cap 24 Specimen Cavity & Clamp 23 O-ring Th e Side Entry Specimen Chamber Figure 5 T he Side Entry Chamber 25 Tilt Knob 27 Z-Adjustment Knob 26 Indicator Light 28 Tilt Lock Lever Startup Procedure 22 23 24 26 25 27 28 ...
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Philips CM12 - page 7
Erwin Sabio Philips CM12 Alignment & Setup Manual Page 7 Powering Up the Microscope 1. Start by loggin g in to the compute r connected to t he TEM. Login is a necessary step to prevent unauthorized users from accessing the microscope. Without login, the control panel is no t accessible. 2. Turn on the cont rol panel by pushi ng the Power Swi tc ...
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Philips CM12 - page 8
Erwin Sabio Philips CM12 Alignment & Setup Manual Page 8 3. Start saturating the filament by slow ly turning the Filament Knob [ 18 ] clockwise. Each cli ck raises the level by one with a wait time of 5 seconds between each step. Figure 8 The gre en beam seen at t he viewing scree n represents visuall y the beam of ele ctrons. 4. As the filamen ...
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Philips CM12 - page 9
Erwin Sabio Philips CM12 Alignment & Setup Manual Page 9 Column Alignment Centering the Beam 1. To center the bea m more easil y, adjust the intensi ty knob [ 9 ] to find the cross ov er i.e. the brightest an d more focused bea m setting. (Note: i f the intensity knob is a little hard to control, press the FINE button [ 10 ] to spread or concen ...
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Philips CM12 - page 10
Erwin Sabio Philips CM12 Alignment & Setup Manual Page 10 Condenser Aperture Adjustment Figure 11 A non-concen tric beam is seen w hen the condenser aperture is not aligned. 1. The condenser ape rture controls the beam that passes through the condense r lens. If the ape rture is not aligned, the beam will not spread con centrically on either si ...
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Philips CM12 - page 11
Erwin Sabio Philips CM12 Alignment & Setup Manual Page 11 Sample Loading & Unloading Mounting the Sample Figure 13 An example of a TEM grid used to hold t hin film samples 1. Samples for the CM 12 are deposited as thin films on a copper mesh grid such as in Fi gure 13. This grid is the one loaded into the specimen holder (Figure 4) by first ...
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Philips CM12 - page 12
Erwin Sabio Philips CM12 Alignment & Setup Manual Page 12 Sample Image Adjustment-Optimizing Eucentric (Z) Height Figure 14 The center of the four holes in this sample can be chosen as a refere nce point for z-height adjustmen t. 1. Adjust the bea m intensity on the sample or increase the magnification by turning the magni fication knob [ 14 ] ...
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Philips CM12 - page 13
Erwin Sabio Philips CM12 Alignment & Setup Manual Page 13 5. Once rotation cen ter has been aligned , press ALGN to exit the curren t mode. Sample Image Adjustment-Centering the Pivot Point 1. Adjusting the pi vot point ensures that the bea m of electrons coincide in one spot. To start, go to the crossover of the bea m. Figure 15 I f the beam s ...
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Philips CM12 - page 14
Erwin Sabio Philips CM12 Alignment & Setup Manual Page 14 Obtaining the Image Fine Tuning the Microscope 1. Use the mechanical stage controls to selec t certain areas of the sample to be captured. 2. Increase the ma gnification and adjust the focus knobs as necessary to see textures and fine fea tures of the sample. 3. Use the binocul ars [ 6 ] ...
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Philips CM12 - page 15
Erwin Sabio Philips CM12 Alignment & Setup Manual Page 15 Power Down Sequence 1. Return the view ing screen back to its original position and spread the bea m. 2. If high magni fication was used, low er the magnific ation to about 7100x by moving the magni fication knob counter-cloc kwise. 3. Go to MODE > C ONFIGURATION then turn the fil ame ...
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Philips CM12 - page 16
Erwin Sabio Philips CM12 Alignment & Setup Manual Page 16 Photo Credits Figure # Source 1 Mehraeen S. (2007, January 19). 230L, first report. Email attachment. 2 Browning, Nigel (2006) . 1Experiment. p. 4, EMS 230L Internal Presentation. 3 Ibid. 4 Ibid. 5 Mehraeen S. (2007, January 19). 230L, first report. Email attachment. 6 Author’s photo 7 ...
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