Fragmentation experiments with Havre melt: dry and induced fuel-coolant interaction runs

Here we present the data records (raw data) from 19 fragmentation experiments. In these runs silicic HVR254 dome rock (retrieved from the submarine Havre volcano) was crushed, remelted and fragmented using two different experimental settings:
1. dry runs (records labelled "D"): melt was fragmented by injection of pressurized Ar gas.
2. induced fuel-coolant interaction runs (records labelled "IFCI"): a water layer was established on top of the melt, before gas was injected from below. This caused fragmentation of the melt plug under IFCI conditions.

Note that the runs D07, D08, D09, IFCI08 and IFCI09 used a reduced melt mass (100g instead of 250g).
Files contain (separated by column) records of: time, trigger signal, force, pressure, microphone, electric field, seismic data.
The units and amplification settings used are provided in the file headers.

In addition, the results of morphometry analysis (t-tests) are provided in a pdf file. The morphometric analyses of natural ash focused exclusively on the curvi-planar grains dominant in Havre ash samples, labelled "Nat1" - "Nat6".
Four types of experimental grains were compared with them:
• “DG”: particles from dry runs, from the lab floor
• “IG”: grains from open IFCI runs, from the lab floor
• “IW”: very small particles from open IFCI runs deposited in water droplets on the walls and ceiling around the experimental area
• “IU”: particles from IFCI runs with U-tube, from the water bowl

本研究提供19次碎裂实验的原始数据记录。本次实验以取自海底哈弗火山的硅质HVR254穹顶岩（silicic HVR254 dome rock）为原料，通过两种实验方案完成粉碎、重熔与碎裂流程：
1. 干实验（编号标记为"D"）：通过注入加压氩气使熔浆发生碎裂。
2. 诱导燃料-冷却剂相互作用实验（编号标记为"IFCI"）：先在熔浆表层铺设水层，再从下方注入气体，于IFCI实验条件下实现熔塞碎裂。

需注意，D07、D08、D09、IFCI08及IFCI09号实验采用减量熔浆质量（仅100g，而非标准的250g）。

数据文件以列分隔格式存储以下记录：时间、触发信号、力值、压力、麦克风信号、电场信号及地震数据。实验所用单位与增益参数均已在文件头中注明。

此外，本数据集附带一份PDF文件，内含形态计量分析（morphometry analysis，基于t检验）的结果。针对天然火山灰的形态计量分析仅聚焦于哈弗火山灰样品中占主导的曲面平面颗粒（curvi-planar grains），编号为"Nat1"至"Nat6"。

本次实验设置四类实验颗粒样本与上述天然灰样本开展对比：
• "DG"：干实验后收集自实验室地面的颗粒
• "IG"：开放式IFCI实验后收集自实验室地面的颗粒
• "IW"：开放式IFCI实验中沉积于实验区域周边墙面与顶棚水滴内的超细颗粒
• "IU"：搭载U型管的IFCI实验中取自盛水容器的颗粒