Slit Height

It is thus reasonable to make the slit height H of the detector slit wider than the integral breadth of the intrinsic primary beam profile. In this case the observed integral breadth equals H - and can be accurately determined from the measured primary beam profile. 

Note The ultimate resolution of a magnetic sector mass spectrometer is reached when the slits are closed to a width of a few micrometers. Often, the slit height is also reduced, e.g., from 5 to 1 mm In daily work, the resolution will be set to fit the actual task, e.g., R = 1000-2000 for low resolution work, R = 3000-5000 if accurate mass determination at high scan rates is needed (GC-MS, Chap. 12) or isotopic patterns of high mass analytes have to be resolved, or R = 7000-15,000 in slow-scanning accurate mass measurements. 

To increase light throughput in Raman systems, the CCD chip size can be increased vertically to match the spectrograph slit height. However, large-format CCD detectors show pronounced slit image curvature that must be corrected in preprocessing (described below). 

When the image of elongated excitation sources, e.g., arcs, flames, plasmas, etc., is focused along the slit height of a polychromator, the spatial intensity information (vertical axis) is accurately relayed to the exit focal plane, concurrently with the horizontal spectral dispersion. Thus, by (electronically) dividing the target into a few tens of tracks, the entire spectral profile of these sources can be simultaneously observed and quantitatively studied. 

I is the diameter of the intermediate image, D the diameter of the field lens, % the entrance slit height and ai,a2 and a3 are the distances between the respective lenses. Furthermore ... 

Collection fibers aligned along the slit height of monochromator... 

Size of air inlet slits 10 5 rows of rings each has 12 slits of diameter 8 mm (slit height 8 mm)... 

A dc arc, operating at 10 A for 25 sec, was used for excitation. Electrode spacing was 2 mm, entrance slit width was 10 fim and slit height was 2 mm. The germanium line at 3039 A was used for the analysis and the chromium line at 3053 A served as internal standard. Spectral plates were Eastman Kodak SA-1 and development was in D-19 developed for 4 min at 68°F. The unknown germanium solutions were prepared exactly as the standards and excitation and development conditions were the same. 

Requires larger access port 5000-10 000 Poor utilization of slit height Many probes to one analyzer... 

Taking into account the maximum possible slit height of the reactor or the maximum coating thickness from reaction asp>ects, influence on the material asp>ects is obvious. 

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