Incident generation

No tests available, but history may help to identify source and exposure characteristics (majority of incidents generating exposures to humans involve trucking with labels on vehicle). 

The final consequence category in Table 1.9 is economic loss. All process incidents generate losses in one or more of the following areas ... 

Evidence should provide reasons why the accident occurred, the sequence of events leading up to the accident, and a possible or plausible event sequence. When you have collected all your evidence, you will want to use one or more analysis techniques discussed in Chapters 7 through 11. Once all facets are analyzed, then appropriate interventions and prevention activities can be put forward and a final report on the incident generated. 

The sound pressure P was produced at the point D by the ultrasonic sound source which was generated at the point B in "n" order of the munite area AA by the incident beam. The sound pressure P is given by the equation(l)... 

Optical second-harmonic generation (SHG) has recently emerged as a powerful surface probe [95, 96]. Second harmonic generation has long been used to produce frequency doublers from noncentrosymmetric crystals. As a surface probe, SHG can be caused by the break in symmetry at the interface between two centrosymmetric media. A high-powered pulsed laser is focused at an angle of incidence from 30 to 70° onto the sample at a power density of 10 to 10 W/cm. The harmonic is observed in reflection or transmission at twice the incident frequency with a photomultiplier tube. 

Figure B2.3.6. CM angle-velocity contour plot for the F + D2 reaction at an incident relative translational energy of 1.82 kcal mol [26], Contours are given at equally spaced intensity intervals. This CM differential cross section was used to generate the calculated laboratory angular distributions given in figure B2.3.4. (By pennission from AIP.)...

Question. Show that the third term in Equation (9.11) results in the generation of radiation of frequency 3v when radiation of frequency v is incident on a crystal capable of third harmonic generation. 

Because the second term in the brackets contains 3v in the sine function, radiation at a frequency which is three times that of the incident radiation is generated. This is referred to as third harmonic generation. The first term in brackets indicates that some radiation of unchanged frequency also results. 

The second term on the right-hand side, a component oscillating at frequency 2co, represents the second harmonic of the incident beam. This component of the polarization vector can radiate light at the frequency 2co. Observation of the second harmonic generation was demonstrated in the early 1960s using mby lasers (59). 

---