Target holder

Fig. 10.18. AP-MALDI ion source with extended transfer capillary. Insets (a) the target holder can be equipped with a 64-spot MALDI target or (b) a 10 x 10-spot DIOS chip. Adapted fromRef. [142] by permission. John Wiley Sons, 2002.

Shift of target holder potential VH by AV in a direction opposite to the previous charging of the insulator... 

By two dimensional (2D) imaging of brain tissues, a defined sample area (several cm ) of a thin section of brain tissue (thickness 20(j,m) was ablated hue by line with a focused laser beam in a cooled laser ablation chamber (using two Peltier elements behind the target holder made of aluminium). The spot size of the laser beams was about 50(xm, the laser power density 3 x 10 Wcm . Ion intensities of the analytes, e.g., P+, Cu or Zn , were... 

Fig. 18. Target holder for operation at liquid Nj temperatures. The targets are mounted rotating disc.

The entire PMMA device or the PDMS cover was mounted onto a modified MALDI target holder for analysis. A schematic representation of the ion source configuration used with this approach is shown in Figure 10.1 and photographs of the setup from front and behind are shown in Figure 10.2. The target holder consisted of a circular stainless steel piece with a recess milled across the center to accommodate the size of the device. A similar piece of stainless steel was used to hold the device from the rear. A slit was cut across the center of the front piece to allow a laser beam to interrogate the device channel... 

Sputtering Every sputtering process involves the creation of gas plasma (usually in argon) in a low pressure chamber (from 5 x 10 to 10 mbar) between a cathode, the target holder, and the anode that is conveniently... 

Place the aluminized target in the target holder of the spin device and set the spin speed to that empirically determined (see step 5). 

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