DOMIENIKAN, CLAUDIOCOSTA, PRISCILAGENEZINI, FREDERICO A.ZAHN, GUILHERME S.2018-01-102018-01-10DOMIENIKAN, CLAUDIO; COSTA, PRISCILA; GENEZINI, FREDERICO A.; ZAHN, GUILHERME S. Low-cost amplifier for alpha detection with photodiode. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. <b>Proceedings...</b> Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017. Disponível em: http://repositorio.ipen.br/handle/123456789/28270.http://repositorio.ipen.br/handle/123456789/28270A low-cost amplifier for Hamamatsu S3590-09 PIN photodiode to be used in alfa detection is presented. This amplifier consists basically of two circuits: a pulse preamplifier and a shaper-driver. The PIN photodiode is reverse-biased and connected to a charge preamplifier input. Incident alpha particles generate a small current pulse in the photodiode. The integrating circuit of the low noise preamplifier transforms current pulse into a voltage pulse with amplitude proportional to the charge carried by the current pulse. The shaper-driver consists of a differentiator and an integrator and is responsible for filtering and further amplifying the preamplifier signal, generating a NIM-compatible energy pulse. The performance of the set photodiode-amplifier was successively tested through the use of a 243Am radioactive source. The low-cost photodiode amplifier was designed and constructed at IPEN - CNEN/SP using national components and expertise.openAccessalpha detectionalpha spectrometersamericium 243amplifiersperformancephotodiodesbrazilian cnenradiation monitoringTexto completo de eventohttps://orcid.org/0000-0003-3237-8588https://orcid.org/0000-0002-6318-6805