From: bill.sloman@ieee.org   
      
   On 10/11/2025 4:01 am, john larkin wrote:   
   > On Sun, 9 Nov 2025 18:34:12 +1100, Bill Sloman    
   > wrote:   
   >   
   >> On 9/11/2025 5:35 am, john larkin wrote:   
   >>> On Sun, 9 Nov 2025 04:26:06 +1100, Bill Sloman    
   >>> wrote:   
   >>>   
   >>>> On 9/11/2025 2:25 am, john larkin wrote:   
   >>>>> On Fri, 07 Nov 2025 19:23:31 GMT, Jan Panteltje    
   >>>>> wrote:   
   >>>>>   
   >>>>>>> liz@poppyrecords.invalid.invalid (Liz Tuddenham)wrote:   
   >>>>>>>> Bill Sloman  wrote:   
   >>>>>>>   
   >>>>>>>> On 7/11/2025 10:41 am, john larkin wrote:   
      
      
      
   >>> But the Pockels Cell driver works and is a few per cent of the volume   
   >>> of coventional MHz-KV designs.   
   >>>   
   >>> How would you design such an inductor? Or such a pulser?   
   >>   
   >> I'd find out what the Pockels cell needed, and go from there. Sometimes   
   >> you can reorganise the parts that are being driven to make them easier   
   >> to drive.   
   >   
   > Of course I had requrements. It's a cavity dumper of sorts.   
   >   
   >>>>> https://highlandtechnology.com/Product/T850   
   >>>>>   
   >>>>> We have a carefully selected red Sharpie pen that is the official coil   
   >>>>> former.   
   >>>>   
   >>>> Measuring the internal diameter with vernier calipers could give you a   
   >>>> more easily archived reference.   
   >>>>   
   >>>>> That thing takes 48V from a wall wart and makes 1400 volt pulses at   
   >>>>> MHz rates into a Pockels Cell.   
   >>>>   
   >>>> Somebody more image-conscious might have machined (or 3D printed) a   
   >>>> metal helix to more precisely specified dimensions. Something a bit   
   >>>> bigger might have been easier to cool.   
   >>>   
   >>> Size affects inductance!   
   >>   
   >> So does number of turns.   
   >>   
   >>> The customer hasn't complained.   
   >>   
   >> So it is good enough. Not necessarily as good as it might have been.   
   >   
   > Design a better kilovolt pulser. Show us.   
      
   Show us the specification you were designing to. And throw in the money   
   you got for doing the job. The specification was probably inadequate -   
   customers do have a nasty habit of finding new requirements after you   
   have roughed out a tentative solution.   
      
   >> Engineering  has been defined as doing for one dollar what any damned   
   >> fool could do for two.   
   >>   
   >> Low volume niche markets rarely justify that kind of optimisation.   
   >   
   > My main object is to amuse myself. Often enough, people want to buy   
   > the results.   
      
   You may believe that. More objective observers might be more skeptical.   
      
   --   
   Bill Sloman, Sydney   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)