H7421シリーズは、GaAsP/GaAs光電面のメタルパッケージ光電子増倍管と電子冷却素子を内蔵したフォトンカウンティングヘッドです。電子冷却素子により光電面から生じるサーマルノイズを低減、高QEの光電面との組合せにより極微弱な光もSN良く計測することができます。 H7421-40は、300 nm ～ 740 nmの波長域で高感度であり、H7421-50は、380 nm ～ 920 nmの広い波長範囲に感度があります。 光電子増倍管の近くにサーミスタを取り付けており、この出力をモニターし電子冷却素子への電流を制御することで、光電子増倍管の温度を一定に保つことができます。
|感度波長 (Short)||300 nm|
|感度波長 (Long)||740 nm|
|感度波長 (Peak)||580 nm|
|外形寸法 (W x H x D)||56 x 36 x 104 mm|
|カウントリニアリティ||1.5 x 106 s-1|
|ダークカウント Typ.||100 s-1|
|ダークカウント Max.||300 s-1|
|出力パルス波高 Min.||3 V|
|出力パルス波高 Typ.||3.6 V|
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