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--- namespace:ga_notebook [2026/04/29 17:24] – [04/28/2026] admin
+++ namespace:ga_notebook [2026/05/27 21:11] (current) – [05/15/2026] admin
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 ======2026 Notebook=====
+====05/26/2026====
+Nanowires(With CD): 3 shots per location, +50um fudge factor, Streak set to 100ns
+-322029
+Oscilloscope: Ch1 MIT-PMT(1" Lead), Ch2 Al Diode, Ch3 OUR-PMT(1" Lead), CH4 Cu Diode
+====05/22/2026====
+Test Claude with Nanowires(with CD) set up
+~20 spots, 5 shots each: 320183-293
+locations, at 5 shots per, at different fudge factors
+um:320466-540
+-150um: 542-616
+-100um: 618-703
+-50um: 705-779
++50um: 781-855
++150um: 886-984
++100um: 986-1068
+Oscilloscope: Ch1 MIT-PMT(1" Lead), Ch2 Al Diode, Ch3 OUR-PMT(1" Lead), CH4 Cu Diode
+====05/21/2026====
+Did some testing with different fudge factors, it was hard to see anything. even the Diode signal was low.
+Oscilloscope: Ch1 MIT-PMT(1" Lead), Ch2 Al Diode, Ch3 OUR-PMT(1" Lead), CH4 Cu Diode
+====05/19-20/2026====
+Nano wires without CD:
+um raster steps
+Rastering started at 319538-755, again at 782-841, 843-3200056
+streak stopped at 319899
+rastering again t 320058-171
+====05/13-15/2026====
+so I realized the I wasn't rastering and the short pulse created a hole in the Saph.
+we test just a Saph window, and got the same results at the D2O/DTi.
+we moved to a lot of CD2 tape and CH.
+MIT Users left on Friday
+Monday we will take NanoWires
+====05/12/2026====
+got everything ready to go, including the drilling in the code, but there was an iris closed so we had to vent. then we found cracks in the 200um glass, after a few shots. and went home for the day.
+====05/11/2026====
+did some drilling, but got a late start due to changing the delay from 53ns to 47.5ns(Steve said too). because we our saturating Frodo's signal, we never were at focus, so it took 5-7 shots to get a decent signal. Non signal on our PMT, but there was on MIT's
+====05/08/2026====
+I helped set up but I had to leave for Delanies birthday. they did both short and long pulse and get signal on our PMT. they learned that drilling with the short pulse 3-4 times was benefiting
+====05/07/2026====
+I took shots of just the ring pulse, with variable delay times of the wedge laser. the particles were too dense and it was very hard to see. the goal was to see the shock
+====05/06/2026====
+MIT WEEK 2, FIRST HALF
+We did more shots on the CD2. Gil coded the rastering, so that we can zigzag cross the CD2 tape. we got 1  bubble on Monday. The PMT seems to be shorting when under vacuum. still idk why.
+On Tuesday, we started testing the delay line and the long pulse. Gil made a telescope to better focus the delayed beam, so that it doesn't torch an optic. while I created a delay ling for after the compressor using 2inch optics. At the end, before the compressor was best. Since I took some 2inch mounts from the long path, Yun we created the long path with 1 inch optics and realigned everything.
+I went to move the frame the holds the CD2 target out of the way, but ended up breaking the mount the holds the 35mm lens. I replaced it with the one the ucsd students were using.
+On Wednesday, Gil got the fast diode set, so that we can see the timing between the wedge laser and long pulse. and he got the Frodo, auto focusing to work. We did some shots onto the CD2 foil, with only the ring pulse. But couldn't see any convergence of the ring. Yun created the nanoparticle target. I made reconnected the flipper motor to auto block and unblock the Frodo laser. I did some shots with just the long pulse onto the nanoparticle target. and I think I see convergence. Especially at 760,585,000 ps and 760,605,000ps delay.
+====05/01/2025====
+Week 1 of MIT DONE
+we started Tuesday - Friday: started working on the delay line and the point stability. While discussing, the best way to get high neutron yield. We went through different ideas, such as :
+  * different nano particle such as Ti and Ti2 with D2O, nanowires, and CD2.
+  * using ps focus pulses, instead of our fs
+  * no rings
+  * thinner sapphires or even holes
+ps focus beam won't work because ps it too long of time scale to get energy into the system.
+we want more energy, short time scale, but low intensity. so that leaves the size of the beam to be our main variable. Gil added that we can just more the target 2-3 Rayleigh lengths away from focus and get a lower intensity
+We ended Friday but firing at CD2 solid film, with just the entire short pulse, all 20 mJ. we got a single neutron bubble, which is great! still need to understand the PMT.
+we Got the new focus and got FRODO to work.
+  - Get the Focus of the main beam and the TCC FADUCIAL at the same spot on the focal spot monitor.
+  - then get FRODO light to the same location and same focal plane as the main beam. Use the mirror in front of the Frodo camera to steer Frodo light into it. This tells your when the mains beam is at the focus by comparing in to FRODOs.
 ====04/28/2026====
 the other week, spoke with Mario about the next steps for Galadriel. After Pacific Fusion, with Sean, we move to MIT campaign. Then after might move back to Pacific Fusion and in June move to UCSD.