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Spectral characteristics of LLPF-WD

Here we present images of LLPF-WD taken in near IR, near UV, and in blue-green spectral range through, respectively, KS-19, UFS-2 and SZS-21 filters. Due to the low sensitivity
of the camera in near IR and near UV range, in these cases we give, along with the raw images, the processed ones (with brightness increased).

Most interesting result here is that LLPF-WD have UV luminescence, which lasts about few tenths of second, which evidences the presence of metastable states with high excitation level and implies a nonthermal character of the energy storing in LLPF-WD.
 

1. Near UV observations
 

Frame No
(Time)
Processed
Raw
1

(40ms)

2

(80ms)

3

(120ms)

4

(160ms)

5
 

(200ms)

6
 

(240ms)

Another series of UV images is here.


2. Near IR observation.
 

Frame No
(Time)
Processed
Raw
1

(40ms)

2

(80ms)

3

(120ms)

4

(160ms)

5
 

(200ms)

6
 

(240ms)

7
 

(280ms)


 

3. Blue-green spectral range images.
 

Here only raw images are presented, their numbers, starting from the discharge beginning, are given below each image.
 
 


1

 
 


2

 
 


3

 
 


4

 
 


5

 
 


6

 
 


7

 
 

As can be seen on the above images, the plasma volume has tendency to splitting up, so it takes the shape of an "ear" (see frame 5) and then breaks up  on 2 objects. This phenomenon can be related with the influence of the electric field of the nearby lead (left on the images) which was under high positive potential during the whole experiment (about 2kV after the current breaking). For more information on the possible EMF effects  see

Next  page: Some effects - guiding, branching, and splitting of the objects

 


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