noun
proving ground; test site; experimental station
A physical location or facility where experiments, tests, or trials are conducted, often for scientific, military, or industrial purposes.
新しいロケットの実験場は砂漠にある。
The test site for the new rocket is in the desert.
この研究所には広大な実験場が併
This research institute has a large proving ground attached.
試験場 is a testing site often for examinations or product testing, while 実験場 emphasizes experimental trials.
Compound of 実験 (experiment) and 場 (place, site).