EuXFEL #3063 experiment on iron and iron alloys under planetary cores conditions

Proposal EuXFEL 3063 Melting and partial melting of iron and iron alloys under planetary cores conditions September 2022 XFEL Experimental Summary Pure Fe diamond anvil cells Pulse train shape changing -Change in train shape at the beginning of P1 cell (middle of revolver #2) -Before P1 and after P1, the ramp -This change was not expected -Change of train shape (flat shape) required before HIBEF 52 (end of Revolver #3) -Keeping this one for the rest of the run Calibration Experiment started with calibration from previous run ●run 18 is Cr2O3 with 30% beam, distance: 357.548 mm Calibration redone on Sep 17 sep: ●1 pulse, Run 223: 1%, Run 224: 1%, Run 225: 5%, Run 226: 10% ●Clean data analysis should use these!! Translation of detector after run 524 to get larger 2theta angles ●Runs 525530 calibrating AIGIPD positions. Calibrant: Cr2O3 ●New calibration file Cr2O3calibration_run530.poni Cell are located on the upstream camera. ●Correction for diamond distance: (n-1)/n * d where ○n is diamond refractive index (2.42) ○d is the diamond thickness (1.6 mm for Boehler Almax) ●Correction in distance is ○1 mm for BA diamonds on upstream side ○Needs calculation for other types of diamonds ○Detector distance needs to be reduced by whatever the correction is Revolver 1 Keep in mind that for streak camera measurements with gain 30% (from run55) have to be recalibrated. Revolver 1 Pos. Order Cell Sample Pressure 1. 1 HIBEF 04 Fe in KCl 45 GPa 2. 3 oxek 011 Fe in SiO2 69 GPa 3. 2 HIBEF 22 Fe in KCl 10 GPa 4. 4 BETSA E Fe in KCl 102 GPa HIBEF 04 - Fe in KCl, 45 GPa POSITION 1: 200 pulses / run - run 5 to 19 : transmission 0.1% to 1.5% - last run 20 (0.2% tr) POSITION 2: 200 pulses / run - run 21 test at 0.2%, run 22: 1.5% POSITION 3: 200 pulses / run - run 23, 0.2% , run 24 missed, run 25 2%, run 26 0.2 % POSITION 4: 352 pulses / run - run 27, 0.2% , 28 at 2.5%, run 29 at 0.2% POSITION 5: 352 pulses / run - run 30, 0.2% , 31 at 4.0%, run 32 at 0.2% POSITION 6: 352 pulses / run - run 33, 0.2% , 34 at 6.0%, run 35 at 0.2% 1 2 3 4 5 6 HIBEF 22 - Fe in KCl, 10 GPa 12 3 5 4 POSITION 1: 352 pulses / run -run 036 to 43: 0.1 to 0.8 % transmission -> 352 pulses -Quench on run 44 POSITION 2: 352 pulses / run -Run 045: 0.05% tr -Run 046: 0.7% -Run 047: 0.05 POSITION 3: 352 pulses / run -Run 048: 0.05% tr -Run 049: 1.0% -Run 050: 0.05% POSITION 4 -run 51 0.05% -run 52 2% -run 53 0.05% POSITION 5: out of FIB line -run 54 0.05% -run 55 1.5% -run 56 0.05% DESY21J11 (oxek 011) - Fe in SiO2, 69 GPa POSITION 1: 352 pulses / run -Runs 57 to 71, 0.1 to 1.5% transmission -Messy diffraction at 72 POSITION 2: -run 072: 0.1% transmission -run 073: 1.5% transmission -run 074: 0.1% transmission POSITION 3: -run 075: 0.1% transmission, -run 076: 2.0% transmission -run 077: 0.1% transmission, POSITION 4 -run 078: 0.1% transmission, -run 079: 2.5% transmission -run 080: 0.1% transmission 1 2 4 3 BETSA E - Fe in KCl, 102 GPa POSITION 1: 352 pulses / run -Run 81 at 0.1 to 2.5% at run 105 -Quench data at run 106 POSITION 2: -run 107: 0.1% transmission -run 108: 3.0% transmission -run 109: 0.1% transmission POSITION 3: -run 110: 0.1% transmission -run 111: 3.0% transmission -run 112: 0.1% transmission -run 113: 3.5% transmission -run 114: 0.1% transmission -run 115: 4.0% transmission -run 116: 0.1% transmission POSITION 4 -In KCl (not Fe) -Increasing tr run 117, 0.1% to 4% at run 131 1 2 4 3 P1 – Fe in KCl – 80 GPa All runs are 352 images at 4.4 MHz POSITION 1: 412-416 beam issue, realignement POSITION 1-2: small increase in intensity -Run 417 to 425: increase intensity from 0.1% to 4% -Run 306 at updated position with 2% Position 2: -Run 427 : 0.5% -Run 428 : 4% -Run 430 : 4.5% -Run 431 : 0.5% POSITION 3: -Run 433 : 4.5% -Run 435 : 4.5 % -Run 436 : 0.5 % 123 BETSA-A – Fe in KCl – 152 GPa All runs are 352 images at 4.4 MHz POSITION 1: -Run 437-443 : rising transmission from 0.5 to 3 % POSITION 2: More inside the sample -Run 444 to 460: increase transmission from 0.5% to 11% -Run 461 : 0.5 % -Run 462 : 13 % -Run 463 : 0.5 % POSITION 3: High intensity X-ray -Run 464 : 1 % -465 to 469: 10 to 14 % -470 : 1 % 1 23 HIBEF 44 - Fe in KCl – 10 GPa Position1 Position2 Position3 1 2 3 All runs are 352 images at 4.4 MHz. POSITION 1: run 472 to 486 gradual increase in transmission from 0.1% to 1.5% run 487 : 0.1 % POSITION 2: Run 488 : 0.1 % run 489 at 2% Run 490 : 0.1 % POSITION 3: Run 491 : 0.1 % Run 492 at 4% Run 493 : 0.1 % Revolver 3 Revolver 3 Pos. Cell Sample Pressure 1. Hibef 60 Fe in KCl 59 GPa 2. CC273 Fe in KCl 218 GPa 3. Hibef 38 Fe in KCl 208 GPa CC273 – Fe in KCl– 219 GPa Position 1 (but X-rays are probably not aligned on the cross) All runs are 352 images at 4.4 MHz. Alignment: runs 497 and 498 Increase in transmission, runs 499 to 515 ●1% to 10% Run 516: transmission 1% HIBEF 38 – Fe in KCl – P = 208 GPa All runs are 352 images at 4.4 MHz. Alignment: runs 517 to 524 ! Change of detector position (translation to get large 2theta’s) ●Runs 525530 calibrating AIGIPD positions. Calibrant: Cr2O3 ●New calibration file Cr2O3calibration_run530.poni Alignment: runs 531 to 546 Increase in transmission ●Run 546 to 555: 1% to 9% ●556 - 557: 1% ●558: 8% ●559: 1% ●560, 561: 8% transmission ●562: 5% transmission HIBEF60 – Fe in KCl – P = 59 GPa x 2 4 1 3 All runs are 352 images at 4.4 MHz. POSITION 1: run 564 to 587 from 0.1% to 2.8%, POSITION 2: run 588 at 3.5% run 588 at 0.1% run 590 at 4.5% run 581 at 0.1% POSITION 3: laser heating Run 592 : 0.5 % Run 593 0.5% waveplate 22 Run 594 : Run 595 : X-ray tuning POSITION 4: laser heating Run 596 : 0.5 % transmission Run 597 0.5% waveplate 25 Run 598 : 0.5 % transmission POSITION 5: In KCL 599 to 602 : detector probems run 603 to 609 and to 616, transmission from 0.5% to 3.5% and then decreasing to 0.5% Run 617 : 1 % transmission HIBEF60 – Fe in KCl – P = 59 GPa Position laser ali Position 1 Position 2 Position 3 Position 4 x 2 4 1 3 Revolver 4 CDMVA9 - Fe in KCl – 172 GPa (after P increase) Position 1 (runs 880 to 897, all 352 pulses) ●50 us streak window / 30 mcp gain on SOP ●Increase in transmission, 1 % to 10 %, runs 882 to 897 ●Realignement ●Increase in transmission, 1 % to 40 %, runs 898 to 910 ●Probable diamond failure at run 910 Position 1 Before 898 End of run