Ion mobility (IMS)

OpenWRaw does not decode ion mobility.

SYNAPT acquisitions open and decode like any other bundle: each scan is returned as calibrated m/z and intensity, the same as for a QTof without a mobility cell. There is no drift-time output in Rust or Python, mzML output carries no mobility arrays, and no run declares a mobility array kind.

In the public corpus, SYNAPT functions store 8-byte Encoding D records, and within every sampled scan m/z never decreases, so a stored scan is not split into drift-ordered blocks. Where the drift time is recorded is not yet known; see the format specification for what has been established.